Patents by Inventor Frank S. Clark

Frank S. Clark 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).

  • Ester base lubricating compositions having improved oxidative resistance
    Patent number: 3986965
    Abstract: The oxidation resistance of synthetic ester base functional fluids is enhanced by incorporating in the fluid small amounts of triphenylphosphine or triphenylphosphine oxide together with a complex alkali metal organophosphorus compound.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: October 19, 1976
    Assignee: Monsanto Company
    Inventors: Frank S. Clark, Stanley L. Reid