Patents by Inventor Lance W. Pihlstrom

Lance W. Pihlstrom 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).

  • High temperature gasket
    Patent number: 4156533
    Abstract: Gasketing material is produced by combining a tubular casing of braided or woven from continuous inorganic filaments, such as alumina-boria-silica fibers, with a core composition comprising a major proportions of intumescent material, suitably unexpanded vermiculite. Heating the gasket in situ results in expansion to give a resilient gasket stable to temperatures of about 1000.degree. to 1200.degree. C.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: May 29, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James R. Close, Lance W. Pihlstrom