    <SEC-DOCUMENT>0001558370-25-008620-index.html : 20250613
    <SEC-HEADER>0001558370-25-008620.hdr.sgml : 20250613
    <ACCEPTANCE-DATETIME>20250613161510
    ACCESSION NUMBER:		0001558370-25-008620
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20241231
    FILED AS OF DATE:		20250613
    DATE AS OF CHANGE:		20250613
    EFFECTIVENESS DATE:		20250613

    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:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-35521
    		FILM NUMBER:		251046743

    	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>ARS
    <SEQUENCE>1
    <FILENAME>clir-20241231xars.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: clir-20241231xars.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>