<SEC-DOCUMENT>0001104659-21-088913-index.html : 20210702
<SEC-HEADER>0001104659-21-088913.hdr.sgml : 20210702
<ACCEPTANCE-DATETIME>20210702163144
ACCESSION NUMBER:		0001104659-21-088913
CONFORMED SUBMISSION TYPE:	S-8 POS
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20210702
DATE AS OF CHANGE:		20210702
EFFECTIVENESS DATE:		20210702

FILER:

	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

	FILING VALUES:
		FORM TYPE:		S-8 POS
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-238613
		FILM NUMBER:		211070649

	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

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CLEARSIGN COMBUSTION CORP
		DATE OF NAME CHANGE:	20080507
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8 POS
<SEQUENCE>1
<FILENAME>tm2121168d4_s8pos.htm
<DESCRIPTION>S-8 POS
<TEXT>
Document 1 - file: tm2121168d4_s8pos.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>tm2121168d4_ex5-1.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: tm2121168d4_ex5-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>tm2121168d4_ex23-1.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 3 - file: tm2121168d4_ex23-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>tm2121168d4_ex5-1img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: tm2121168d4_ex5-1img001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>tm2121168d4_ex23-1img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: tm2121168d4_ex23-1img001.jpg

</DOCUMENT>
</SEC-DOCUMENT>