Patents by Inventor Phillip J. Politza

Phillip J. Politza 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).

  • Perfluoroelastomer seal
    Patent number: 5137771
    Abstract: A mating seal having a sealing surface of perfluoroelastomer in the form of a ring having a flange on at least the outer edge of the ring and a mechanically anchored retaining plate positioned radially inward from the flange on the outer edge of the ring.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: August 11, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas F. Lofe, Phillip J. Politza