The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2020
Filed:
Nov. 27, 2017
Applicant:
Clearsign Technologies Corporation, Seattle, WA (US);
Inventors:
Douglas W. Karkow, Mount Vernon, IA (US);
Joseph Colannino, Oceanside, CA (US);
Igor A. Krichtafovitch, Kirkland, WA (US);
Robert E. Breidenthal, Seattle, WA (US);
Christopher A. Wiklof, Everett, WA (US);
Assignee:
CLEARSIGN TECHNOLOGIES CORPORATION, Seattle, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
F23C 5/08 (2006.01); F23D 14/14 (2006.01); F23D 14/20 (2006.01); F23D 14/74 (2006.01); F23M 5/02 (2006.01); F23C 99/00 (2006.01); F23D 14/70 (2006.01); F23D 14/84 (2006.01); F23D 23/00 (2006.01);
U.S. Cl.
CPC ...
F23D 14/14 (2013.01); F23C 5/08 (2013.01); F23C 99/001 (2013.01); F23D 14/20 (2013.01); F23D 14/70 (2013.01); F23D 14/74 (2013.01); F23D 14/84 (2013.01); F23D 23/00 (2013.01); F23M 5/025 (2013.01); F23C 2200/00 (2013.01); F23N 2237/02 (2020.01);
Abstract
A perforated flame holder and burner including a perforated flame holder provides reduced oxides of nitrogen (NOx) during operation. The perforated flame holder includes a pattern of elongated apertures extending between a proximal and a distal surface of the flame holder relative to a fuel nozzle. The perforated flame holder can provide a significantly reduced flame height while maintaining heat output from the burner.