Patents by Inventor John H. Kampfer

John H. Kampfer 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).

  • Combination sink trap access port filtration device
    Patent number: 4164048
    Abstract: A drain trap pipe with an access port and filtration member including a pipe having a straight portion terminating in a curved portion overlying the straight portion. A tubular extension is connected to and communicating with the pipe substantially at the juncture of said straight portion and said curved portion. The extension portion has formed on the inner surface thereof opposed channel formations into which the edges of a filtration member are inserted. The filtration member extends the length of the extension and the diameter of the pipe with a transparent cap on the outer end of the extension.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: August 14, 1979
    Inventors: John H. Kampfer, Michael L. Kampfer, Philip A. Martens