Patents by Inventor Joseph M. Marr

Joseph M. Marr 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).

  • Methods for enhancing the thermal quenching of a metal surface
    Patent number: 4969959
    Abstract: A method for enhancing the thermal quenching of a metal surface comprises treating the metal surface with a complex phosphate acid ester. The metal surface is simultaneously or subsequently treated with a thermal quenching fluid. The method is particularly adapted for use in thermal quenching of aluminum and aluminum alloy surfaces.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: November 13, 1990
    Assignee: Reynolds Metals Company
    Inventors: Joseph M. Marr, Barry L. Riddle