Patents by Inventor Marshall E. Bishop

Marshall E. Bishop 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).

  • Method for making an inflatable mandrel
    Patent number: 4707205
    Abstract: An inflatable mandrel supported upon a cylindrical surface, the cylindrical surface opposing a mandrel ply coated on only one surface with a rubberizing compound so that the obverse, uncoated mandrel ply surface opposes the cylindrical supporting surface. Such mandrels have utility in being easily removable from a building drum and easily installed upon a cylindrical support surface.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: November 17, 1987
    Inventors: Marshall E. Bishop, Duane E. Thewlis
  • Inflatable mandrel and method therefor
    Patent number: 4632328
    Abstract: An inflatable mandrel supported upon a cylindrical surface, the cylindrical surface opposing a mandrel ply coated on only one surface with a rubberizing compound so that the obverse, uncoated mandrel ply surface opposes the cylindrical supporting surface. Such mandrels have utility in being easily removable from a building drum and easily installed upon a cylindrical support surface.
    Type: Grant
    Filed: July 25, 1985
    Date of Patent: December 30, 1986
    Assignee: The B. F. Goodrich Company
    Inventors: Marshall E. Bishop, Duane E. Thewlis