Patents by Inventor Robert G. Pistole

Robert G. Pistole 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).

  • Sleeve for changing diameter of collapsible mandrel
    Patent number: 4278490
    Abstract: A collapsible mandrel having a longitudinally slit tubular shell providing a molding surface for glass fiber reinforced plastic pipe is provided with a removably mountable longitudinally slit sleeve as a molding surface for pipe of larger diameter.
    Type: Grant
    Filed: December 21, 1979
    Date of Patent: July 14, 1981
    Assignee: Owens-Corning Fiberglas Corporation
    Inventors: Robert G. Pistole, Walter A. Stoll, Leo A. Oswald