<SEC-DOCUMENT>0001144204-18-050522-index.html : 20180924
<SEC-HEADER>0001144204-18-050522.hdr.sgml : 20180924
<ACCEPTANCE-DATETIME>20180924163230
ACCESSION NUMBER:		0001144204-18-050522
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20180924
DATE AS OF CHANGE:		20180924

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CLEARSIGN COMBUSTION CORP
		CENTRAL INDEX KEY:			0001434524
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-227169
		FILM NUMBER:		181083860

	BUSINESS ADDRESS:	
		STREET 1:		12870 INTERURBAN AVENUE SOUTH
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98168
		BUSINESS PHONE:		(206) 673-4848

	MAIL ADDRESS:	
		STREET 1:		12870 INTERURBAN AVENUE SOUTH
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98168
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>v503337_424b3.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: v503337_424b3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>image_001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: image_001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>image_002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: image_002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>image_003.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: image_003.jpg

</DOCUMENT>
</SEC-DOCUMENT>