(19)

(11)

EP 3 669 121 A1

(12)

(43) Date of publication: 24.06.2020 Bulletin 2020/26 (21) Application number: 18836068.9 (22) Date of filing: 19.07.2018

(51) International Patent Classification (IPC):  F23D 14/26(2006.01) F23D 14/32(2006.01) F23D 14/58(2006.01) (86) International application number: PCT/US2018/042935 (87) International publication number: WO 2019/018675 (24.01.2019 Gazette 2019/04)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 18.07.2017 US 201762534193 P (71) Applicant: ClearSign Technologies Corporation Seattle, WA 98168 (US)	(72) Inventors: KARKOW, Douglas W. Des Moines, Washington 98198 (US) KENDRICK, Donald Bellevue, Washington 98008 (US) DANSIE, James K. Renton, Washington 98056 (US) WIKLOF, Christopher A. Mill Creek, Washington 98012 (US) (74) Representative: Trinks, Ole  Meissner Bolte Patentanwälte Rechtsanwälte Partnerschaft mbB Postfach 10 26 05 86016 Augsburg 86016 Augsburg (DE)