Patents by Inventor Kurt H. Wyss

Kurt H. Wyss 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).

  • Filter element and assembly
    Patent number: 4861353
    Abstract: A tubular textile of filamentary poly (tetrafluoroethylene) useful to prolong the mechanical life of a filter material. An assembly for filtering comprising a cage, the tubular filamentary PTFE, and a superjacent filter.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Kurt H. Wyss
  • High temperature filter felt
    Patent number: 4840838
    Abstract: A high temperature filter felt comprising a scrim and an entangled batt. The machine-direction component of the scrim is made up of intermeshed continuous filament yarns which are 40 to 75% glass fibers and 25 to 60% poly(tetrafluoroethylene) fibers. The fiber of the cross-machine direction component of the scrim is glass, poly(tetrafluoroethylene), aramid, polyacrylate, polyphenylene sulfide or blends of these fibers or the bulked yarn previously described at the machine-direction yarn.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: June 20, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Kurt H. Wyss