<SEC-DOCUMENT>0001104659-25-081941-index.html : 20250822
<SEC-HEADER>0001104659-25-081941.hdr.sgml : 20250822
<ACCEPTANCE-DATETIME>20250822170031
ACCESSION NUMBER:		0001104659-25-081941
CONFORMED SUBMISSION TYPE:	424B4
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20250822
DATE AS OF CHANGE:		20250822

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ClearSign Technologies Corp
		CENTRAL INDEX KEY:			0001434524
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B4
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-289549
		FILM NUMBER:		251247040

	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>424B4
<SEQUENCE>1
<FILENAME>tm2523685d3_424b4.htm
<DESCRIPTION>424B4
<TEXT>
Document 1 - file: tm2523685d3_424b4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>tm2523685d3_424b4img01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: tm2523685d3_424b4img01.jpg

</DOCUMENT>
</SEC-DOCUMENT>