<SEC-DOCUMENT>0001558370-22-005775-index.html : 20220422
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<ACCEPTANCE-DATETIME>20220422090209
ACCESSION NUMBER:		0001558370-22-005775
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20220422
DATE AS OF CHANGE:		20220422

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:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35521
		FILM NUMBER:		22843576

	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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<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>tmb-20220422xdefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: tmb-20220422xdefa14a.htm

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<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>tmb-20220422xdefa14a002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: tmb-20220422xdefa14a002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tmb-20220422xdefa14a001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: tmb-20220422xdefa14a001.jpg

</DOCUMENT>
</SEC-DOCUMENT>