<SEC-DOCUMENT>0001104659-23-097773-index.html : 20230901
<SEC-HEADER>0001104659-23-097773.hdr.sgml : 20230901
<ACCEPTANCE-DATETIME>20230901161553
ACCESSION NUMBER:		0001104659-23-097773
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20230901
DATE AS OF CHANGE:		20230901

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:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-273927
		FILM NUMBER:		231232740

	BUSINESS ADDRESS:	
		STREET 1:		8023 E. 63RD PLACE, SUITE 101
		CITY:			TULSA
		STATE:			OK
		ZIP:			74133
		BUSINESS PHONE:		(918) 236-6461

	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>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>tm2323370d2_424b3.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: tm2323370d2_424b3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>tm2323370d2_424b3img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: tm2323370d2_424b3img001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tm2323370d2_424b3img002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: tm2323370d2_424b3img002.jpg

</DOCUMENT>
</SEC-DOCUMENT>