Patents by Inventor John N. Strunk

John N. Strunk 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).

  • Valve with perfluoroelastomer packing
    Patent number: 5549276
    Abstract: Valves having a stem packing of alternating layers of perfluoroelastomer and high temperature polymer provide outstanding sealing performance against corrosive fluids and high temperatures.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: August 27, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gary M. Pittman, Kenneth A. Senior, John N. Strunk, Krishnan R. Thondukolam