Patents by Inventor William D. Brentnall

William D. Brentnall 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).

  • Coating composition and method of forming
    Patent number: 5279649
    Abstract: A coating composition comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. The bonding solution advantageously contains a relatively small but essential amount of vanadium pentoxide and, preferably, magnesium. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding aluminum powder to form the slurry. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: January 18, 1994
    Assignee: Solar Turbines Incorporated
    Inventors: Alvin R. Stetson, William D. Brentnall, Zaher Z. Mutasim, Lulu L. Hsu
  • Corrosion resistant seal coat composition and method of forming
    Patent number: 5279650
    Abstract: A seal coat composition comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and iron oxide (Fe.sub.2 O.sub.3) powder. The bonding solution advantageously contains a relatively small but essential amount of vanadium pentoxide and, preferably, magnesium. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding iron oxide powder to form the slurry. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates to neutralize the bonding solution prior to formation of the slurry.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: January 18, 1994
    Assignee: Solar Turbines Incorporated
    Inventors: Alvin R. Stetson, William D. Brentnall, Zaher Z. Mutasim, Lulu L. Hsu
  • Coating composition and method of forming
    Patent number: 5242488
    Abstract: A coating composition for ferrous metal alloy surfaces comprises a slurry consisting essentially of an aluminum neutralized phosphate bonding solution and aluminum powder. A process for forming the bonding solution component of the coating slurry includes equilibrating an aqueous phosphate solution with a small but controlled and necessary amount of solute aluminum prior to adding aluminum powder to form the slurry. The bonding solution preferably also contains magnesium. The present invention overcomes the problem of bonding solutions which require environmentally disadvantageous chromates or molybdates to neutralize the bonding solution prior to formation of the slurry.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: September 7, 1993
    Assignee: Solar Turbines Incorporated
    Inventors: Alvin R. Stetson, William D. Brentnall, Zaher Z. Mutasim