Patents by Inventor John Kawa

John Kawa 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).

  • Method of preventing grease buildup in ductwork
    Patent number: 5271959
    Abstract: A method of protecting vent hoods and exhaust ductwork from buildup of grease and grime comprising coating the vent hoods and exhaust ductwork with a thin coating of a grease repelling removable non-hygroscopic composition.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: December 21, 1993
    Assignee: S. C. Johnson & Son, Inc.
    Inventors: Andrew M. Bober, John Kawa