<SEC-DOCUMENT>0001104659-25-080929-index.html : 20250820
<SEC-HEADER>0001104659-25-080929.hdr.sgml : 20250820
<ACCEPTANCE-DATETIME>20250820163049
ACCESSION NUMBER:		0001104659-25-080929
CONFORMED SUBMISSION TYPE:	S-1/A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20250820
DATE AS OF CHANGE:		20250820

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:		S-1/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-289549
		FILM NUMBER:		251237214

	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>S-1/A
<SEQUENCE>1
<FILENAME>tm2523685d1_s1a.htm
<DESCRIPTION>FORM S-1/A
<TEXT>
Document 1 - file: tm2523685d1_s1a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>tm2523685d1_ex23-1.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 2 - file: tm2523685d1_ex23-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tm2523685d1_s1img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: tm2523685d1_s1img001.jpg

</DOCUMENT>
</SEC-DOCUMENT>