<SEC-DOCUMENT>0001104659-22-105889.txt : 20221004
<SEC-HEADER>0001104659-22-105889.hdr.sgml : 20221004
<ACCEPTANCE-DATETIME>20221004163307
ACCESSION NUMBER:		0001104659-22-105889
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20221003
FILED AS OF DATE:		20221004
DATE AS OF CHANGE:		20221004

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HOFFMAN Robert Thurston Sr
		CENTRAL INDEX KEY:			0001748409

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35521
		FILM NUMBER:		221292215

	MAIL ADDRESS:	
		STREET 1:		119 WARREN AVENUE
		CITY:			SPRING LAKE
		STATE:			NJ
		ZIP:			07762

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ClearSign Technologies 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

	BUSINESS ADDRESS:	
		STREET 1:		8023 E. 63RD PLACE, SUITE 101
		CITY:			TULSA
		STATE:			OK
		ZIP:			74133
		BUSINESS PHONE:		(918) 236-7770

	MAIL ADDRESS:	
		STREET 1:		8023 E. 63RD PLACE, SUITE 101
		CITY:			TULSA
		STATE:			OK
		ZIP:			74133

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CLEARSIGN COMBUSTION CORP
		DATE OF NAME CHANGE:	20080507
</SEC-HEADER>
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    <footnotes>
        <footnote id="F1">As compensation for services as a non-executive director during the quarter ending December 31, 2022, the reporting person was granted restricted stock units (&quot;RSUs&quot;) under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.</footnote>
        <footnote id="F2">The RSUs will vest upon the first to occur of: (1) a Change in Control (as defined in the applicable RSU award agreement), (2) the reporting person's Disability (as defined in the applicable RSU award agreement); (3) the reporting peron's death; or (4) the reporting person's separation from service.</footnote>
        <footnote id="F3">As compensation for services as a non-executive director during the quarter ended September 30, 2022, the reporting person was granted RSUs under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.</footnote>
        <footnote id="F4">As compensation for services as a non-executive director during the quarter ended June 30, 2022, the reporting person was granted RSUs under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.</footnote>
        <footnote id="F5">As compensation for services as a non-executive director during the quarter ended March 31, 2022, the reporting person was granted RSUs under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.</footnote>
        <footnote id="F6">As compensation for services as a non-executive director during the quarter ended December 31, 2021, the reporting person was granted RSUs under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.</footnote>
        <footnote id="F7">As compensation for services as a non-executive director during the quarter ended September 30, 2021, the reporting person was granted RSUs under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.</footnote>
        <footnote id="F8">As compensation for services as a non-executive director during the quarter ended June 30, 2021, the reporting person was granted RSUs under the ClearSign Technologies Corporation 2021 Equity Incentive Plan and each RSU represents a right to receive one share of common stock or the cash equivalent thereof.</footnote>
        <footnote id="F9">The right to exercise the option and purchase the option shares vested in equal increments as follows: the right to purchase 21,625 shares vested on May 9, 2019 and the right to purchase the remaining 64,875 shares vested in equal increments on the last day of each calendar quarter during 2019.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert T. Hoffman</signatureName>
        <signatureDate>2022-10-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</SEC-DOCUMENT>
