Patents by Inventor William D. Parizot

William D. Parizot 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).

  • Fired process heater
    Patent number: 4412975
    Abstract: Combustion gas passes upwardly through the radiant section of a fired process heater having vertical tubes in such manner that the gas is in predominantly back-mixed flow condition in the lower portion of the radiant section and predominantly plug-flow condition in the upper portion of the radiant section.
    Type: Grant
    Filed: December 17, 1981
    Date of Patent: November 1, 1983
    Assignee: Pullman Incorporated
    Inventors: William D. Parizot, Paul D. O'Lenick, Lowell D. Fraley
  • Fired process heater
    Patent number: 4324649
    Abstract: Combustion gas passes upwardly through the radiant section of a fired process heater having vertical tubes in such manner that the gas is in predominantly back-mixed flow condition in the lower portion of the radiant section and predominantly plug-flow condition in the upper portion of the radiant section.
    Type: Grant
    Filed: July 8, 1980
    Date of Patent: April 13, 1982
    Assignee: Pullman Incorporated
    Inventors: William D. Parizot, Paul D. O'Lenick, Lowell D. Fraley