<SEC-DOCUMENT>0001104659-25-068740-index.html : 20250717
<SEC-HEADER>0001104659-25-068740.hdr.sgml : 20250717
<ACCEPTANCE-DATETIME>20250717173435
ACCESSION NUMBER:		0001104659-25-068740
CONFORMED SUBMISSION TYPE:	S-3
PUBLIC DOCUMENT COUNT:		9
FILED AS OF DATE:		20250717
DATE AS OF CHANGE:		20250717

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-3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-288736
		FILM NUMBER:		251131870

	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-3
<SEQUENCE>1
<FILENAME>tm2520917d1_s3.htm
<DESCRIPTION>FORM S-3
<TEXT>
Document 1 - file: tm2520917d1_s3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.2
<SEQUENCE>2
<FILENAME>tm2520917d1_ex1-2.htm
<DESCRIPTION>EXHIBIT 1.2
<TEXT>
Document 2 - file: tm2520917d1_ex1-2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.1
<SEQUENCE>3
<FILENAME>tm2520917d1_ex4-1.htm
<DESCRIPTION>EXHIBIT 4.1
<TEXT>
Document 3 - file: tm2520917d1_ex4-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>4
<FILENAME>tm2520917d1_ex5-1.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 4 - file: tm2520917d1_ex5-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>5
<FILENAME>tm2520917d1_ex23-1.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 5 - file: tm2520917d1_ex23-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>6
<FILENAME>tm2520917d1_ex-filingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
Document 6 - file: tm2520917d1_ex-filingfees.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>tm2520917d1_ex5-1img011.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: tm2520917d1_ex5-1img011.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>tm2520917d1_ex5-1img012.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: tm2520917d1_ex5-1img012.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>tm2520917d1_s3img01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: tm2520917d1_s3img01.jpg

</DOCUMENT>
</SEC-DOCUMENT>