Patents by Inventor Terence P. Johnson

Terence P. Johnson 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).

  • Oxidation resistant alumina-silica articles containing silicon carbide and carbon
    Patent number: 4798814
    Abstract: A shaped article comprises a continuous alumina-silica of alumina-boria-silica first phase, an in-situ generated discontinuous carbon second phase, and a discontinuous silicon carbide third phase, said article being stable to an oxidative atmosphere when heated to 1300.degree. C. for at least 2 hours.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: January 17, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: George F. Everitt, Terence P. Johnson, Lien-Huong A. Pham
  • Oxidation resistant carbon containing alumina-silica articles
    Patent number: 4732878
    Abstract: A shaped article comprises a continuous alumina-silica first phase, an in-situ generated discontinuous carbon second phase, and optionally a discontinuous silicon carbide third phase, said article being stable to an oxidative atmosphere when heated to 1300.degree. C. for at least 30 minutes.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: March 22, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: George F. Everitt, Terence P. Johnson, Lien-Huong T. Pham