Patents by Inventor Paul W. Runquist

Paul W. Runquist 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).

  • Stratified combustion furnace
    Patent number: 4102318
    Abstract: This invention has to do with apparatus for burning solid fuels in successive stages whereby the fuel is completely converted to clean, hot, incombustible gases and to ashes, and, without admixture, transfers its heat to clean fresh air for distribution to areas to be heated.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: July 25, 1978
    Inventor: Paul W. Runquist
  • Stove
    Patent number: D274931
    Type: Grant
    Filed: December 29, 1981
    Date of Patent: July 31, 1984
    Inventor: Paul W. Runquist