Patents by Inventor DOUG W. KARKOW

DOUG W. KARKOW has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Burner system employing multiple perforated flame holders, and method of operation
    Patent number: 10066833
    Abstract: A burner system includes a plurality of burners, each having a nozzle positioned to emit a stream of fuel into a combustion volume, and a perforated flame holder, including a plurality of apertures extending between first and second faces thereof, and positioned to receive a stream of fuel from the respective nozzle. In operation, the flame holders are configured to hold a flame substantially within the plurality of apertures.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: September 4, 2018
    Assignee: CLEARSIGN COMBUSTION CORPORATION
    Inventors: Joseph Colannino, Doug W. Karkow, Christopher A. Wiklof
  • BURNER SYSTEM EMPLOYING MULTIPLE PERFORATED FLAME HOLDERS, AND METHOD OF OPERATION
    Publication number: 20160230984
    Abstract: A burner system includes a plurality of burners, each having a nozzle positioned to emit a stream of fuel into a combustion volume, and a perforated flame holder, including a plurality of apertures extending between first and second faces thereof, and positioned to receive a stream of fuel from the respective nozzle. In operation, the flame holders are configured to hold a flame substantially within the plurality of apertures.
    Type: Application
    Filed: September 23, 2014
    Publication date: August 11, 2016
    Inventors: JOSEPH COLANNINO, DOUG W. KARKOW, CHRISTOPHER A. WIKLOF