<SEC-DOCUMENT>0001144204-19-001358.txt : 20190110
<SEC-HEADER>0001144204-19-001358.hdr.sgml : 20190110
<ACCEPTANCE-DATETIME>20190110163042
ACCESSION NUMBER:		0001144204-19-001358
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20190104
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20190110
DATE AS OF CHANGE:		20190110

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CLEARSIGN COMBUSTION CORP
		CENTRAL INDEX KEY:			0001434524
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35521
		FILM NUMBER:		19520537

	BUSINESS ADDRESS:	
		STREET 1:		12870 INTERURBAN AVENUE SOUTH
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98168
		BUSINESS PHONE:		(206) 673-4848

	MAIL ADDRESS:	
		STREET 1:		12870 INTERURBAN AVENUE SOUTH
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98168
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>tv510549_8k.htm
<DESCRIPTION>FORM 8-K
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>WASHINGTON, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; text-align: center; margin-bottom: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; text-align: center; margin-bottom: 0"><B></B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; text-align: center; margin-bottom: 0"><B>&nbsp;</B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>FORM 8-K </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CURRENT REPORT </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Pursuant to Section 13 or 15(d) of the </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Securities Exchange Act of 1934 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Date of report (Date of earliest event reported):
January 4, 2019</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; text-align: center; margin-bottom: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; text-align: center; margin-bottom: 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; text-align: center; margin-bottom: 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CLEARSIGN COMBUSTION CORPORATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(Exact name of registrant as specified in
Charter) </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font-size: 10pt">
<TR>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-size: 10pt"><B>Washington</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-size: 10pt"><B>001-35521</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-size: 10pt"><B>26-2056298</B></FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(State or other jurisdiction of</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>incorporation or organization)</B></P></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt"><B>(Commission File No.)</B></FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-size: 10pt"><B>(IRS Employee Identification No.)</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>12870 Interurban Avenue South</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Seattle, Washington 98168</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(Address of Principal Executive Offices)
</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>206-673-4848</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(Issuer Telephone number) </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions (see General Instruction
A.2 below).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD>Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD>Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR240.14a-12)</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD>Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)).</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 0.25in; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD>Pre-commencement communications pursuant to Rule 13e-(c) under the Exchange Act (17 CFR 240.13(e)-4(c))</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Indicate by check mark whether the registrant is an emerging growth
company as defined in Rule 405 of the Securities Act of 1933 (&sect;230.405 of this chapter) or Rule 12b-2 of the Securities Exchange
Act of 1934 (&sect;240.12b-2 of this chapter).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Wingdings">&uml;</FONT>
Emerging growth company</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">If an emerging growth company, indicate by check mark if the registrant
has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided
pursuant to Section 13(a) of the Exchange Act. <FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

<P STYLE="margin-top: 0; margin-bottom: 0"></P>

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<P STYLE="margin-top: 0; margin-bottom: 0"></P>

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<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 1.01</B></TD><TD><B>Entry into a Material Agreement.</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">To the extent required by Item 1.01, the information
included at Item 5.02 is incorporated herein by reference.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 5.02</B></TD><TD><B>Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements
of Certain Officers.</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">On January 4, 2019, Roberto Ruiz, our Chief
Operating Officer, retired from active service and resigned from his office.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Also on January 4, 2019, we executed a Consulting
Agreement and a Confidential Separation Agreement and General Release (&ldquo;Release Agreement&rdquo;) with Mr. Ruiz.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">The Consulting Agreement has a term of two years,
beginning on January 5, 2019 and ending on December 31, 2020. Pursuant to the Consulting Agreement, during the period from January
5, 2019 through March 31, 2019 (the Initial Consulting Period&rdquo;), Mr. Ruiz must provide us with services, as we request them.
Beginning on April 1, 2019 and through the end of the term, any services to be provided will be agreed upon by us and Mr. Ruiz.
During the Initial Consulting Period, Mr. Ruiz will be paid a fee of $70,454.55 for services provided to us for no more than 45
days. If, during the Initial Consulting Period, we request additional services in excess of 45 days, we will pay Mr. Ruiz a daily
rate of $2,000. We will also reimburse Mr. Ruiz&rsquo;s expenses at cost.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="color: Black">Pursuant to the
Release Agreement, in exchange for a full release of any and all claims relating to his employment that Mr. Ruiz may have against
us, we have agreed to pay the cost of his health insurance premiums during the Initial Consulting Period.</FONT></P>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="background-color: white">The above
summaries are qualified in their entirety by reference to the Consulting Agreement, which is included as Exhibit 10.1, and the
Release Agreement, which is included as Exhibit 10.2, to this Current Report on Form 8-K and both of which are incorporated by
reference into this Item 5.02 in their entirety.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 9.01</B></TD><TD><B>Financial Statements and Exhibits.</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-size: 10pt">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Exhibit No.</B></FONT></TD>
    <TD STYLE="width: 2%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 88%; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Description</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><A HREF="tv510549_ex10-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">10.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tv510549_ex10-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">Consulting Agreement between ClearSign Combustion Corporation and Roberto Ruiz</FONT></A></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><A HREF="tv510549_ex10-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">10.2</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tv510549_ex10-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">Confidential Separation Agreement and General Release between ClearSign Combustion Corporation and Roberto Ruiz</FONT></A></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">SIGNATURE</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this Current Report to be signed on its behalf by the undersigned hereunto
duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Dated: January 10, 2019</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-size: 10pt">
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2"><FONT STYLE="font-size: 10pt">CLEARSIGN COMBUSTION CORPORATION</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 5%">&nbsp;</TD>
    <TD STYLE="width: 45%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt">/s/ Brian Fike</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Brian Fike</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Interim Chief Financial Officer</FONT></TD></TR>
</TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 2.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Exhibit Index</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-size: 10pt">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 10%; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Exhibit No.</B></FONT></TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 89%; border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Description</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><A HREF="tv510549_ex10-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">10.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tv510549_ex10-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">Consulting Agreement between ClearSign Combustion Corporation and Roberto Ruiz</FONT></A></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><A HREF="tv510549_ex10-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">10.2</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tv510549_ex10-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-size: 10pt">Confidential Separation Agreement and General Release between ClearSign Combustion Corporation and Roberto Ruiz</FONT></A></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>2
<FILENAME>tv510549_ex10-1.htm
<DESCRIPTION>EXHIBIT 10.1
<TEXT>
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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0; text-align: right">Exhibit 10.1</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0; text-align: right">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0; text-align: left">CONSULTING AGREEMENT</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: left; text-indent: 0.5in">This Consulting Agreement
(&ldquo;Agreement&rdquo;), dated January 4, 2019 and effective on January 5, 2019 (the &ldquo;Effective Date&rdquo;), is by and
between Dr. Roberto Ruiz, whose address is 126 247<SUP>th</SUP> Avenue SE, Sammamish, Washington 98074 (the &ldquo;Consultant&rdquo;),
and ClearSign Combustion Corporation, whose address is 12870 Interurban Avenue South, Seattle, Washington 98168 (the &ldquo;Company&rdquo;),
in reference to the following:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">RECITALS</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>A.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
Consultant has been the Company&rsquo;s Chief Operating Officer since February 2016 and has substantial experience and knowledge
regarding the Company&rsquo;s business and operations.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>B.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
Consultant retired from active employment with the Company at the close of business on January 4, 2019 and resigned from the offices
he held on that date.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>C.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
Company intends to hire a Chief Executive Officer (the &ldquo;Successor CEO&rdquo;) to replace Stephen E. Pirnat, who retired on
December 31, 2018.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>D.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
Company wishes to retain the Consultant for the purpose of, and the Consultant has agreed to render services to the Company for
the purpose of, assisting the Successor CEO as he transitions into his new duties and responsibilities, as well as to provide the
Company with the Consultant&rsquo;s expertise whenever requested.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>NOW, THEREFORE,</B> for good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and the Consultant agree as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">AGREEMENT</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>1.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Term</U>.</B>
Subject to Section 5 of this Agreement, the term of this Agreement will begin on the Effective Date and will end on December 31,
2020 (the &ldquo;Term&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>2.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Duties
of Consultant</U>.</B> As requested in writing, including by e-mail, by the interim Chief Executive Officer or the Successor CEO,
the Consultant will provide services relating to the business and operations of the Company including, but not limited to, assistance
with the transition of responsibilities to the Successor CEO, and any other services previously performed by the Consultant during
his tenure as the Company&rsquo;s Chief Operating Officer (collectively, the &ldquo;Services&rdquo;), including on-site business
development activities. During the Initial Consulting Period (as defined below) the Company will continue to provide the Consultant
with the office he occupied during his employment with the Company and the Consultant will continue to use the e-mail address roberto.ruiz@clearsign.com.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Compensation</U>.</B>
For the period beginning on January 5, 2019 and ending on March 31, 2019 (the &ldquo;Initial Consulting Period&rdquo;) the Consultant
shall provide the Services whenever asked (subject to the Non-Work Days set forth below) for up to 45 days and shall be paid a
total fee of $70,454.55 (the &ldquo;Compensation&rdquo;). The Compensation shall be payable in installments of $23,484.85 each,
which payments shall be made at the end of each month of the Initial Consulting Period. For Services rendered during the Initial
Consulting Period in excess of 45 days, the Consultant shall be paid the sum of $2,000 per day (the &ldquo;Daily Rate&rdquo;).
During the Initial Consulting Period, with the exception of the Non-Work Days, the Consultant must provide the Services as requested
by the Company. Following the Initial Consulting Period and throughout the remainder of the Term, if the Company requires additional
services from the Consultant and the Consultant agrees to provide such additional services, the Consultant will provide such services
at the Daily Rate. In addition to the Compensation and the Daily Rate, the Company shall reimburse the Consultant&rsquo;s expenses
at cost. Any aggregated expenses (for example, airfare, taxi, hotel and meals) greater than $1000 must be previously authorized
by the Company. <FONT STYLE="font-size: 10pt">Daily Rate compensation and the Consultant&rsquo;s expenses shall be </FONT>payable
within 10 business days of presentation of an invoice detailing the hours/days worked and expenses. Irrespective of the foregoing,
the Company agrees that it shall not require the Consultant to provide the Services on January 11 or 14, 2019 or on February 25,
26 and 27, 2019 (collectively, the &ldquo;Non-Work Days&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>4.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Nondisclosure</U>.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in"><B>4.1</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Access
to Confidential Information. </B>The Consultant agrees that during the Term, the Consultant will have access to and become acquainted
with confidential proprietary information (&ldquo;Confidential Information&rdquo;) which is owned by the Company and is regularly
used in the operation of the Company&rsquo;s business. The Consultant agrees that the term &ldquo;Confidential Information&rdquo;
as used in this Agreement is to be broadly interpreted and includes (i) information that has, or could have, commercial value for
the business in which the Company is engaged, or in which the Company may engage at a later time, and (ii) information that, if
disclosed without authorization, could be detrimental to the economic interests of the Company. The Consultant agrees that the
term &ldquo;Confidential Information&rdquo; includes, without limitation, any patent, patent application, copyright, trademark,
trade name, service mark, service name, &ldquo;know-how,&rdquo; negative &ldquo;know-how,&rdquo; trade secrets, customer and supplier
identities, characteristics and terms of agreements, details of customer or contracts, pricing policies, operational methods, marketing
plans or strategies, product development techniques or plans, business acquisition plans, science or technical information, ideas,
discoveries, designs, computer programs (including source codes), financial forecasts, unpublished financial information, budgets,
processes, procedures, formulae, improvements or other proprietary or intellectual property of the Company, whether or not in written
or tangible form, and whether or not registered, and including all memoranda, notes, summaries, plans, reports, records, documents
and other evidence thereof. The Consultant acknowledges that all Confidential Information, whether prepared by the Consultant or
otherwise acquired by the Consultant in any other way, shall remain the exclusive property of the Company. The term &ldquo;Confidential
Information&rdquo; does not include (i) any information known to the Consultant prior to disclosure by the Company or its representatives,
(ii) any information which becomes available to the Consultant on a non-confidential basis from a source other than the Company
who is not bound by a confidentiality agreement with, or any other contractual, legal or fiduciary obligation of confidentiality
to, the Company or any related party with respect to such information and (iii) any information which is or becomes generally available
to the public other than as a result of a disclosure by the Consultant in breach of this Agreement. In the event that the Consultant
receives a request to disclose all or any part of the Confidential Information under the terms of a valid and effective subpoena
or order issued by a court of competent jurisdiction the Consultant agrees to immediately notify the Company of the existence,
terms and circumstances surrounding such a request. The Company agrees to assume, at its sole charge and expense, any costs that
are the direct result of actions taken at the direction or request of the Company (and, if any payments are made by the Consultant,
to promptly reimburse the Consultant for such payments), including any fees and disbursements to legal counsel that the Consultant
incurs.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in"><B>4.2</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>No
Unfair Use by Consultant.</B> The Consultant promises and agrees that the Consultant (which shall include his advisors, consultants,
contractors and affiliates) shall not misuse, misappropriate, or disclose in any way to any person or entity any of the Company&rsquo;s
Confidential Information, either directly or indirectly, nor will the Consultant use the Confidential Information in any way or
at any time except as required in the course of the Consultant&rsquo;s business relationship with the Company. The Consultant agrees
that the sale or unauthorized use or disclosure of any of the Company&rsquo;s Confidential Information constitutes unfair competition.
The Consultant promises and agrees not to engage in any unfair competition with the Company and will take measures that are appropriate
to prevent his advisors, consultants, contractors or affiliates from engaging in unfair competition with the Company.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in"><B>4.3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Obligations
Survive Agreement.</B> The Consultant&rsquo;s obligations under this Section 4 shall survive for a period of five years after the
expiration or termination of this Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>5.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Termination;
Return of Company Property.</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in"><B>5.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Automatic
Termination.</B> This Agreement will terminate automatically upon the expiration of the Term (unless otherwise extended by written
agreement between the Consultant and the Company) or upon the death or disability of the Consultant, provided that as a result
of the disability the Consultant is no longer able to perform the Services required by this Agreement for a period of at least
15 days.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in"><B>5.2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return
of Company Property.</B> Upon the termination of the Initial Consulting Period, the Consultant shall immediately transfer to the
Company all files (including, but not limited to, electronic files), records, documents, drawings, specifications, equipment and
similar items in his possession or the possession of his advisors, consultants, contractors and affiliates relating to the business
of the Company or its Confidential Information (including the work product of the Consultant created pursuant to this Agreement);
provided, however, that once the Company&rsquo;s Confidential Information and programs licensed to the Company are deleted from
the hard drive by the Company&rsquo;s IT technician, the Consultant will assume ownership of the Apple laptop computer purchased
by the Company for use by the Consultant, including any personal files stored in the hard drive.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>6.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Status
of Consultant</U>.</B> The Consultant understands and agrees that he is not an employee of the Company and that he is not entitled
to receive employee benefits from the Company, including, but not limited to, sick leave, vacation, retirement or death benefits.
The Consultant shall be responsible for providing, at the Consultant&rsquo;s expense and in the Consultant&rsquo;s name, disability,
worker&rsquo;s compensation or other insurance as well as licenses and permits usual or necessary for conducting the Services hereunder.
Furthermore, the Consultant shall pay, when and as due, any and all taxes incurred as a result of the Consultant&rsquo;s compensation
hereunder, including estimated taxes, and shall provide the Company with proof of said payments, upon demand. The Consultant hereby
agrees to indemnify the Company for any claims, losses, costs, fees, liabilities, damages or injuries suffered by the Company arising
out of the Consultant&rsquo;s breach of this Section 6.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>7.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Representations
by Consultant</U>.</B> The Consultant represents that the Consultant has the qualifications and ability to perform the Services
in a professional manner, without the advice, control, or supervision of the Company.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>8.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Work
for Hire</U></B>. The Consultant shall perform the Services as &ldquo;Work for Hire&rdquo; where copyright, title, patent, ownership
and other proprietary rights of all material produced shall be retained by the Company and its assignees.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>9.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Notices</U>.</B>
Unless otherwise specifically provided in this Agreement, all notices or other communications (collectively and severally called
&ldquo;Notices&rdquo;) required or permitted to be given under this Agreement, shall be in writing, and shall be given by: (A)
personal delivery (which form of Notice shall be deemed to have been given upon delivery), (B) by telegraph or by private airborne/overnight
delivery service (which forms of Notice shall be deemed to have been given upon confirmed delivery by the delivery agency), or
(C) by electronic (e-mail) delivery (which form of Notice shall be deemed delivered upon confirmed transmission or confirmation
of receipt). Notices shall be addressed to the addresses set forth below, or to such other address as the receiving party shall
have specified most recently by like Notice, with a copy to the other party.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">If to the Company:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">ClearSign Combustion Corporation</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">12870 Interurban Avenue South</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Seattle, Washington 98168</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Attn.: Chief Financial Officer</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">E-Mail: brian.fike@clearsign.com</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">If to the Consultant:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Dr. Roberto Ruiz</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">126 247<SUP>th</SUP> Avenue SE</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Sammamish, Washington 98074</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">E-Mail: bruin79gopher86@gmail.com</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>10.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Choice
of Law and Venue</U>.</B> This Agreement shall be governed according to the laws of the state of Washington. Venue for any legal
or equitable action between the Company and the Consultant which relates to this Agreement shall be in the county of King in the
State of Washington.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>11.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Entire
Agreement</U>.</B> This Agreement supersedes any and all other agreements, either oral or in writing, between the parties hereto
with respect to the Services to be rendered by the Consultant to the Company and contains all of the covenants and agreements between
the parties with respect to the Services to be rendered by the Consultant to the Company in any manner whatsoever. Each party to
this agreement acknowledges that no representations, inducements, promises, or agreements, orally or otherwise, have been made
by any party, or anyone acting on behalf of any party, which are not embodied herein, and that no other agreement, statement, or
promise not contained in this Agreement shall be valid or binding on either party.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>12.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Amendment/Waiver</U>.</B>
Except as expressly provided otherwise herein, neither this Agreement nor any of the terms, provisions, obligations or rights contained
herein, may be amended, modified, supplemented, augmented, rescinded, discharged or terminated (other than by performance), except
by a written instrument or instruments signed by all of the parties to this Agreement. No waiver of any breach of any term, provision
or agreement contained herein, or of the performance of any act or obligation under this Agreement, or of any extension of time
for performance of any such act or obligation, or of any right granted under this Agreement, shall be effective and binding unless
such waiver shall be in a written instrument or instruments signed by each party claimed to have given or consented to such waiver
and each party affected by such waiver.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>13.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B><U>Counterparts</U>.</B>
This Agreement may be executed manually or by facsimile signature in two or more counterparts, each of which shall be deemed an
original, and all of which together shall constitute but one and the same instrument.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>14.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Arbitration/Equitable
Relief</U>. </B> The parties hereby agree that all controversies, claims and matters of difference shall be resolved by binding
arbitration before JAMS located in Seattle, Washington according to the rules and practices of JAMS from time-to-time in force;
provided however that the parties hereto reserve their rights to seek and obtain injunctive or other equitable relief from a court
of competent jurisdiction, without waiving the right to compel such arbitration pursuant to this Section. The arbitrator shall
apply Washington law in rendering a decision. The Consultant acknowledges that irreparable injury will result to the Company from
the Consultant&rsquo;s violation of any of the terms of Section 4 (Nondisclosure) of this Agreement. The Consultant expressly agrees
that the Company shall be entitled, in addition to damages and any other remedies provided by law, to an injunction or other equitable
remedy respecting such violation or continued violation.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

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    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>15.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Severability</U>.</B>
If any term or provision of this Agreement or the application thereof to any person or circumstance shall, to any extent, be determined
to be invalid, illegal or unenforceable under present or future laws effective during the Term, then and, in that event: (A) the
performance of the offending term or provision (but only to the extent its application is invalid, illegal or unenforceable) shall
be excused as if it had never been incorporated into this Agreement, and, in lieu of such excused provision, there shall be added
a provision as similar in terms and amount to such excused provision as may be possible and be legal, valid and enforceable, and
(B) the remaining part of this Agreement (including the application of the offending term or provision to persons or circumstances
other than those as to which it is held invalid, illegal or unenforceable) shall not be affected thereby and shall continue in
full force and effect to the fullest extent provided by law.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>16.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Preparation
of Agreement</U>. </B>It is acknowledged by each party that such party either had separate and independent advice of counsel or
the opportunity to avail itself or himself of same. In light of these facts it is acknowledged that no party shall be construed
to be solely responsible for the drafting hereof, and therefore any ambiguity shall not be construed against any party as the alleged
draftsman of this Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>17.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>No
Assignment of Rights or Delegation of Duties by Consultant; Company&rsquo;s Right to Assign</U>. </B>The Consultant&rsquo;s rights
and benefits under this Agreement are personal to him and therefore no such right or benefit shall be subject to voluntary or involuntary
alienation, assignment or transfer. The Company may assign its rights and delegate its obligations under this Agreement to any
other person or entity.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><B>18.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>Electronically
Transmitted Documents</U></B>. If a copy or counterpart of this Agreement is originally executed and such copy or counterpart is
thereafter transmitted electronically by facsimile or similar device, such facsimile document shall for all purposes be treated
as if manually signed by the party whose facsimile signature appears.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">[Signatures appear on next page.]</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 1in"><B>WHEREFORE,</B> the parties have executed this
Agreement on the date first written above.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; border-collapse: collapse; font-size: 10pt">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: bold; text-align: left; layout-grid-mode: line">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; text-align: left; layout-grid-mode: line"><FONT STYLE="font-family: Times New Roman, Times, Serif">&ldquo;Consultant&rdquo;</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 4%">&nbsp;</TD>
    <TD STYLE="width: 46%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>By:</TD>
    <TD STYLE="border-bottom: Black 1pt solid">/s/ Dr. Roberto Ruiz</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Dr. Roberto Ruiz</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2"><B>&ldquo;Company&rdquo;</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2"><B>ClearSign Combustion Corporation</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>By:</TD>
    <TD STYLE="border-bottom: Black 1pt solid">/s/ Robert T. Hoffman Sr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Robert T. Hoffman Sr.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Chairperson of the Board</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>



<P STYLE="margin: 0"></P>

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</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.2
<SEQUENCE>3
<FILENAME>tv510549_ex10-2.htm
<DESCRIPTION>EXHIBIT 10.2
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: right"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: right"><B>Exhibit 10.2</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: right"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CONFIDENTIAL SEPARATION AGREEMENT</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>AND</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>GENERAL RELEASE</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">1.</TD><TD STYLE="text-align: justify"><B><U>SETTLEMENT AND RELEASE</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">This SEPARATION
AGREEMENT AND GENERAL RELEASE (&ldquo;Agreement&rdquo;) is between Roberto Ruiz (&ldquo;Employee&rdquo; or &ldquo;you&rdquo;) and
ClearSign Combustion Corporation (&ldquo;ClearSign&rdquo; or &ldquo;Employer&rdquo;).</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">2.</TD><TD STYLE="text-align: justify"><B><U>RECITALS</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">a.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee
is an at-will employee of ClearSign.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">b.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee
has decided to exercise his right to terminate Employee&rsquo;s employment with ClearSign.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">c.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;To
avoid uncertainty, Employer and Employee desire to settle fully and finally resolve all matters between them arising out of or
related to Employee&rsquo;s employment with, compensation during, and separation from Employer on the terms and conditions set
forth herein as of the date of this Agreement.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">d.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This
Agreement effects the settlement of any disputes between Employer and Employee, and nothing contained herein should be construed
as an admission by Employer of any liability of any kind with respect thereto.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">e.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employer
and Employee expressly recognize that confidentiality of the terms of this Agreement is of the essence, and is a material part
of this Agreement.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">3.</TD><TD STYLE="text-align: justify"><B><U>SEPARATION FROM EMPLOYMENT</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">The effective date
of Employee&rsquo;s termination of employment with the Employer is January 4, 2019 (the &ldquo;Separation Date&rdquo;).</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">4.</TD><TD STYLE="text-align: justify"><B><U>SEVERANCE CONSIDERATION</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">a.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;As
consideration for the release set forth herein, and provided that Employee does not revoke this Agreement within the revocation
period referred to at Section 5(b)(iii) herein, ClearSign will reimburse Employee for the cost of health insurance premiums paid
by Employee for the months of January 2019, February 2019 and March 2019 (the &ldquo;Severance Amount&rdquo;). Payment of the Severance
Amount will be made within 5 business days following the end of each month.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>


<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"></P>

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<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">b.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No
other benefits will be made available to Employee after the Separation Date except as provided herein, or by applicable law.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">c.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee
is solely responsible for the payment of, and therefore promises to pay, any taxes, penalties, or other costs assessed that are
associated with the Severance Consideration. The Released Parties, as defined in Section 5 herein, have no duty with respect to
such taxes, penalties or other costs.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">d.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee
will be paid his wages through the Separation Date less applicable withholdings and deductions through ClearSign&rsquo;s ordinary
semi-monthly payroll system.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">e.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee
is reminded that his outstanding stock option agreements (the &ldquo;Award Agreements&rdquo;) are as summarized on <B><I><U>Exhibit
A</U></I></B> and that, with the contemporaneous execution of a consulting agreement between Employee and ClearSign (the &ldquo;Consulting
Agreement&rdquo;) the Continuous Service provisions of the Award Agreements shall be satisfied. The right to purchase the common
stock of ClearSign pursuant to the Award Agreements will expire 3 months from the termination of the Consulting Agreement for any
reason, unless extended by other means. For the avoidance of doubt, nothing herein shall limit or modify Employee&rsquo;s or ClearSign&rsquo;s
respective rights and obligations under the Award Agreements detailed in <B><I><U>Exhibit A</U></I></B>, which shall each remain
in force unless any such Award Agreement expires or is terminated in accordance with its terms</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">5.</TD><TD STYLE="text-align: justify"><B><U>RELEASE OF ALL CLAIMS</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B>a.</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>CONSIDERATION
FOR RELEASE</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Employee acknowledges
that Employee has received all compensation owed or to be owed to Employee for Employee&rsquo;s employment through and including
January 4, 2019.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Both parties agree
that the monies and other benefits to be provided to Employee hereunder as outlined in Section 4 are in excess of compensation
to which Employee would otherwise be entitled. As such, it is agreed that such monies and benefits provide full and adequate consideration
for Employee&rsquo;s various representations and releases contained herein.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B></B></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B></B></P>

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    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B>b.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;EMPLOYEE
RELEASE</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in">i.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;For
good and valuable consideration as described herein, the receipt and sufficiency of which are hereby acknowledged, Employee, individually
and on behalf of Employee&rsquo;s representatives, heirs, successors and assigns, hereby releases and absolutely forever discharges
ClearSign, its predecessors, successors, parents, partners, subsidiaries, affiliates, agents, assigns, insurers, representatives,
officers, directors, principals, employees, shareholders, and attorneys, from the past, present and future (collectively, the &ldquo;Released
Parties&rdquo;), of and from any and all claims, demands, debts, liabilities, obligations, and causes of actions of every kind
and nature whatsoever, whether now known or unknown, suspected or unsuspected, which Employee may have or ever had, including without
limitation those arising from or relating to Employee&rsquo;s employment with ClearSign, contracts with ClearSign, termination
of employment with ClearSign, or Employee&rsquo;s efforts to find subsequent employment. This release includes, but is not limited
to, any claims, demands, causes of action, or liabilities arising under (a) Title VII of the Civil Rights Act of 1964 (race, color,
religion, maternity or pregnancy, sex and national origin discrimination); (b) 42 U.S.C. &sect;1981 (race discrimination); (c)
29 U.S.C. &sect;&sect;621-634 (age discrimination); (d) 29 U.S.C. &sect;206(d)(1) (equal pay); (e) Executive Order 11246 (race,
color, religion, sex and national original); (f) Executive Order 11141, (age discrimination); (g) Older Workers Benefit Protection
Act of 1990 (age discrimination); (h) &sect;503 of the Rehabilitation Act of 1973 (disabilities discrimination); (i) the Civil
Rights Act of 1991 (discrimination), (j) the Age Discrimination in Employment Act of 1967 (&ldquo;ADEA&rdquo;); (k) the Family
and Medical Leave Act; (l) Washington State Law Against Discrimination, Revised Code of Washington section 49.60; (m) claims with
any division of the Washington State Department of Labor and Industries, (n) Washington Industrial Safety and Health Act; (o) Washington
Family Care Act; (p-o) Seattle Municipal Code, SMC 14.04.030-0,40 (discrimination) (q) any other federal, state or local laws or
regulations prohibiting employment discrimination, harassment or retaliation; and (r) any amendments or additions to any of the
federal, state or local laws or regulations mentioned above. This waiver and release also includes, but is not limited to, any
claims, demands, causes of action, or liabilities arising under or in relation to any oral or written representations or statements
or under any state, local or federal law regulating wages, hours, compensation or employment or any claim for wrongful discharge,
breach of contract, breach of the implied covenant of good faith and fair dealing, intentional or negligent infliction of emotional
distress, or defamation. For the avoidance of doubt, this release is not intended to modify or terminate surviving contractual
and statutory rights and obligations, as specified in Sections 4(e) and 7 herein.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in">ii.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It
is understood and agreed that this Section 5(b) is intended to be a full and final release covering all known as well as all unknown
or unanticipated injuries, debts, claims or damages, of any kind, arising from acts, omissions or events prior to the Separation
Date. Employee waives any and all rights or benefits which Employee may now have under the terms of any statute or law that purports
to limit such a release.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in"></P>

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    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 0.5in; text-indent: 0.5in">iii.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Employee
acknowledges that Employee is knowingly and voluntarily waiving and releasing any rights Employee may have under the ADEA. Employee
also acknowledges that the Severance Consideration provided for in Section 4 herein is in addition to anything of value to which
Employee is otherwise entitled and constitutes sufficient consideration for the waiver and release herein. Employee further acknowledges
that Employee has been advised by this writing, as required by the Older Workers&rsquo; Benefit Protection Act, that: (a) Employee&rsquo;s
waiver and release does not apply to any rights or claims that may arise after the execution of this Agreement; (b) Employee should
consult with an attorney prior to executing this Agreement; (c) Employee has twenty-one (21) days to consider this Agreement (although
Employee may by Employee&rsquo;s own choice execute this Agreement earlier); (d) under the ADEA, Employee has seven (7) days following
the date of his execution of this Agreement by the parties to revoke the Agreement; and (e) this Agreement shall not be effective
until the date upon which such revocation period has expired. If Employee has not executed this Agreement and delivered his executed
signature page by hand delivery, fax or email of a PDF to ClearSign&rsquo;s Chief Financial Officer and/or Chief Executive Officer
by the expiration of the twenty-one (21)-day consideration period referenced in this Section 5(b)(iii), the offer of the Severance
Consideration in this Agreement will expire, and Employee will have no right or claim to the Severance Consideration or any portion
of the Severance Consideration. Employee may revoke this Agreement only by giving ClearSign written notice of Employee&rsquo;s
revocation of this Agreement, by email to the interim CFO, Brian Fike, at brian.fike@clearsign.com transmitted by the close of
business on the seventh (7th) day following the date of Employee&rsquo;s execution of this Agreement.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>6.</B></TD><TD STYLE="text-align: justify"><B><U>NO OTHER ACTIONS</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Employee represents
that Employee has not filed, and will not file, any complaints, charges, or grievances against any or all of the Released Parties
with any city, county, state, or federal agency or court, whether or not arising out of or related to his or her employment with,
compensation during, and separation from ClearSign.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>7.</B></TD><TD STYLE="text-align: justify"><B><U>TRADE SECRETS AND CONFIDENTIALITY</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Employee acknowledges
that Employee previously executed the Confidentiality and Proprietary Rights Agreement (the &ldquo;Confidentiality Agreement&rdquo;)
with ClearSign, attached hereto as <B><I><U>Exhibit B</U></I></B>, and that nothing herein shall limit Employee&rsquo;s obligations
and/or ClearSign&rsquo;s rights under the Confidentiality Agreement, which shall remain in force. Additionally, Employee agrees
to (a) keep confidential the terms of this Agreement, except upon order of any court, as required by law, or to the extent the
terms are made public by ClearSign, including through the Form 8-K attached as <B><I><U>Exhibit C</U></I></B> to be filed with
the Securities and Exchange Commission, and (b) comply with all terms of the Policy of Insider Trading attached as <B><I><U>Exhibit
D</U></I></B> and rules promulgated by the Securities and Exchange Commission as those rules would continue to apply to Employee.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>8.</B></TD><TD STYLE="text-align: justify"><B><U>NON-DISPARAGEMENT</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Employee agrees
not to disparage, directly or indirectly, ClearSign or any of the Released Parties.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"><B></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>


<!-- Field: Page; Sequence: 4 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%">&nbsp;</TD><TD STYLE="width: 33%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>9.</B></TD><TD STYLE="text-align: justify"><B><U>FULL AND INDEPENDENT KNOWLEDGE</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Employee represents
Employee has thoroughly read this Agreement, understands all its provisions, agrees to the terms, and is voluntarily entering into
this Agreement.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>10.</B></TD><TD STYLE="text-align: justify"><B><U>ARBITRATION</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">This Agreement shall be interpreted according
to Washington law, in Seattle, Washington, without regard to its conflict of interest principles. Any claim or controversy arising
from this Agreement shall be resolved by arbitration before a single arbitrator of JAMS in accordance with its Comprehensive Arbitration
Rules and Procedures and judgment on the award rendered by the arbitrator may be entered in any court having jurisdiction thereof.
The single arbitrator shall be selected by mutual agreement of Employee and ClearSign. If such agreement cannot be reached the
arbitrator shall be selected according to the procedures of the JAMS. The single arbitrator shall award the prevailing party all
arbitration costs, arbitrator fees, reasonable attorneys&rsquo; fees and costs incurred by the prevailing party in connection with
the arbitrated claims. The arbitrator shall have authority to issue any remedy or relief that a court of competent jurisdiction
could award, order or grant including, without limitation, a preliminary or permanent injunction. Notwithstanding the foregoing,
either party may, without inconsistency with this provision, apply to any court having jurisdiction for interim, provisional injunctive
or equitable relief until the arbitration award is rendered and the controversy otherwise is resolved.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>11.</B></TD><TD STYLE="text-align: justify"><B><U>ATTORNEYS&rsquo; FEES</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">Each party shall
bear his or its own attorneys&rsquo; fees and costs, except as otherwise provided herein.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>12.</B></TD><TD STYLE="text-align: justify"><B><U>NON-RELEASED CLAIMS</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">This Agreement excludes, and you are
not waiving, (i) any right to file, testify or otherwise cooperate in the investigation of an administrative charge or complaint
with the Equal Employment Opportunity Commission, the National Labor Relations Board or other appropriate federal, state or local
administrative or law enforcement agency, although you are waiving any right to monetary recovery related to such a charge or administrative
complaint; (ii) any right to report conduct that is allegedly unlawful under federal securities laws to any government body or
agency, including the right to receive awards pursuant to Section 21F of the Securities Exchange Act; (iii) claims which cannot
be waived by law, such as claims for unemployment benefits; (iv) any indemnification rights you may have against ClearSign; and
(v) any rights to vested benefits, such as pension or retirement benefits.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0">&nbsp;</P>


<!-- Field: Page; Sequence: 5 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 33%">&nbsp;</TD><TD STYLE="width: 34%">&nbsp;</TD><TD STYLE="width: 33%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"><B>&nbsp;</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in"><B>13.</B></TD><TD STYLE="text-align: justify"><B><U>CONSTRUCTION OF THIS AGREEMENT</U></B></TD></TR></TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">a.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This
Agreement shall be binding upon the signatories and their respective heirs, administrators, representatives, executors, successors,
and assigns, and shall inure to the benefit of Released Parties, and each of them, and to their respective heirs, administrators,
representatives, executors, successors, and assigns, upon whom this Agreement shall also be binding.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">b.<B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</B>Should
any provision of this Agreement become legally unenforceable, no other provision of this Agreement shall be affected, and this
Agreement shall be construed as if the Agreement had never included the unenforceable provision.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">c.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
parties to this Agreement agree that any modification of this Agreement must be in writing, signed by Employee and ClearSign.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">d.<B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</B>THIS
AGREEMENT, TOGETHER WITH THE EXHIBITS, SHALL BE, AND CONSTITUTE FULL, COMPLETE, UNCONDITIONAL, AND IMMEDIATE SUBSTITUTION FOR ANY
AND ALL RIGHTS, CLAIMS, DEMANDS, AND CAUSES OF ACTIONS WHATSOEVER, WHICH HERETOFORE EXISTED OR MIGHT HAVE EXISTED ON BEHALF OF
EMPLOYEE AGAINST ANY OR ALL OF THE RELEASED PARTIES AND THEIR RESPECTIVE SUCCESSORS, PREDECESSORS, SUBSIDIARIES, AFFILIATES, PARENTS,
SHAREHOLDERS, PARTNERS, EMPLOYEES, AGENTS, REPRESENTATIVES, OFFICERS, DIRECTORS, PRINCIPALS, ASSIGNS, INSURERS AND ATTORNEYS. FURTHERMORE,
THIS AGREEMENT, INCLUDING THE EXHIBITS, IS THE ONLY, SOLE, ENTIRE, AND COMPLETE AGREEMENT OF THE PARTIES RELATING IN ANY WAY TO
THE SUBJECT MATTER HEREOF. NO STATEMENTS, PROMISES, OR REPRESENTATIONS HAVE BEEN MADE BY ANY PARTY TO ANY OTHER, OR RELIED UPON,
AND NO CONSIDERATION HAS BEEN OFFERED, PROMISED, EXPECTED, OR HELD OUT OTHER THAN AS MAY BE EXPRESSLY PROVIDED HEREIN.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">e.<B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</B>No
provision of this Agreement shall be modified or construed by any practice that is inconsistent with such provision, and failure
by any party to this Agreement to comply with any provision, or to require another party to comply with any provision, shall not
affect the rights of any party thereafter to comply or require the other to comply.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">f.<B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</B>This
Agreement may be executed and delivered in two or more counterparts, each of which, when so executed and delivered, shall be the
original, but such counterparts together shall constitute but one and the same instrument.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"></P>

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<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">IN WITNESS WHEREOF,
the parties have executed this instrument on the dates indicated below in the County of King, State of Washington.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 49%; line-height: 115%; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>ROBERTO RUIZ </B></FONT></TD>
    <TD STYLE="width: 2%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 49%; line-height: 115%; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>CLEARSIGN COMBUSTION CORPORATION</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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<TR STYLE="vertical-align: top">
    <TD STYLE="width: 49%; border-bottom: Black 1pt solid; line-height: 115%">/s/ Roberto Ruiz</TD>
    <TD STYLE="width: 2%; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 5%; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>By:</B></FONT></TD>
    <TD STYLE="width: 44%; border-bottom: Black 1pt solid; line-height: 115%">/s/ Brian G. Fike</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="line-height: 115%">&nbsp;</TD>
    <TD STYLE="line-height: 115%">&nbsp;</TD>
    <TD STYLE="line-height: 115%">&nbsp;</TD>
    <TD STYLE="padding-left: 9pt; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Brian G. Fike</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 49%; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Dated:&nbsp;&nbsp;January 4, 2019</B></FONT></TD>
    <TD STYLE="width: 2%; line-height: 115%">&nbsp;</TD>
    <TD STYLE="width: 49%; line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Its: Interim Chief Financial Officer&nbsp;&nbsp;</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="line-height: 115%">&nbsp;</TD>
    <TD STYLE="line-height: 115%">&nbsp;</TD>
    <TD STYLE="line-height: 115%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Dated:&nbsp;&nbsp;January 4, 2019</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify">&nbsp;</P>


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<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B><U>Exhibit A</U></B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Outstanding Stock Option Agreements</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">are summarized as follows:</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD NOWRAP STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Option </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Award#</B></P></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-bottom: 1pt">&nbsp;</TD>
    <TD NOWRAP COLSPAN="2" STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Strike </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Price</B></P></TD><TD STYLE="padding-bottom: 1pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD><TD STYLE="font: bold 10pt Times New Roman, Times, Serif; padding-bottom: 1pt">&nbsp;</TD>
    <TD NOWRAP COLSPAN="2" STYLE="font: bold 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid">Options</TD><TD STYLE="padding-bottom: 1pt; font: bold 10pt Times New Roman, Times, Serif">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-bottom: 1pt">&nbsp;</TD>
    <TD NOWRAP STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Date of </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Award</B></P></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-bottom: 1pt">&nbsp;</TD>
    <TD NOWRAP STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Vesting </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Commencement</B></P></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-bottom: 1pt">&nbsp;</TD>
    <TD NOWRAP COLSPAN="2" STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Vested on </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>January </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>4, 2019</B></P></TD><TD STYLE="padding-bottom: 1pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-bottom: 1pt">&nbsp;</TD>
    <TD NOWRAP STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Original </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Expiration </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Date</B></P></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-bottom: 1pt">&nbsp;</TD>
    <TD NOWRAP STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Revised </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Expiriation </B></P> <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Date (1)</B></P></TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 9%; font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">12</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif; text-align: left">$</TD><TD STYLE="width: 10%; font: 10pt Times New Roman, Times, Serif; text-align: right">4.88</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="width: 10%; font: 10pt Times New Roman, Times, Serif; text-align: right">30,000</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="width: 12%; font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">1/17/2013</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="width: 12%; font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">1/1/2013</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="width: 10%; font: 10pt Times New Roman, Times, Serif; text-align: right">30,000</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="width: 12%; font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">12/31/2022</TD><TD STYLE="width: 1%; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="width: 12%; font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2019</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">26</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">$</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">9.90</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">11,500</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">2/13/2014</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">1/1/2014</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">11,500</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">12/31/2023</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2019</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">44</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">$</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">5.21</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">20,000</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">4/1/2015</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">4/1/2015</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">18,750</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2025</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2019</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">55</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">$</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">4.21</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">50,000</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">4/23/2016</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">4/1/2016</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">34,375</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2026</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2019</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">76</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">$</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">3.80</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">10,000</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">6/23/2017</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">4/1/2017</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">4,375</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2027</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2019</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">90</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">$</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">1.90</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">20,000</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">4/12/2018</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">4/1/2018</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right">2,500</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2028</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; padding-left: 5.4pt">3/31/2019</TD></TR>
</TABLE>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin-top: 0; margin-right: 0; margin-bottom: 0">(1) The Revised Expiration Date assumes that Mr.
Ruiz does not maintain Continuous Service as defined in each of the above referenced Stock Option Award Agreements. Mr. Ruiz's
Original Expiration Date would be maintained if he maintains his Continuous Service by becoming a consultant or Director of the
Company.</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 4.65pt">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 4.65pt"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 4.65pt"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0 0 0 4.65pt">&nbsp;</P>


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    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B><U>Exhibit B</U></B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Confidentiality and Proprietary Rights
Agreement</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">executed by Roberto Ruiz on November
16, 2012</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>


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    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B><U>Exhibit C</U></B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Form 8-K</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">regarding separation of Roberto Ruiz</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">and entry into a material agreement</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>


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    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"><B><U>Exhibit D</U></B></P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Statement of ClearSign Combustion Corporation
Policy</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">on</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Insider Trading and Compliance</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">acknowledged by Roberto Ruiz on September
15, 2015</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"></P>



<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">BGF</TD>
    <TD STYLE="line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="text-align: center">RR</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 51%; text-align: center; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 4%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 14%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employer</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD>
    <TD STYLE="width: 5%; line-height: 115%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 13%; border-top: Black 1pt solid">
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Employee</P>
        <P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">Initials</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>


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