Patents by Inventor Allan C. Clark

Allan C. 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).

  • Metal salts of mixed aromatic/aliphatic phosphorodithioic acids
    Patent number: 5178782
    Abstract: A mixture of metal salts of aromatic/aliphatic phosphorodithioic acids is disclosed. The metal salts, a mixture of the aromatic/aliphatic phosphorodithioic acids contain an aliphatic group and an aromatic group, optionally (H) aliphatic groups, and optionally (B) aromatic groups. The (B) aromatic component can be made utilizing phenol and/or mixtures of cresylic acids. The metal salts are oil-soluble and are useful as corrosion inhibitors and anti-wear agents, particularly in lubricating oil compositions.
    Type: Grant
    Filed: March 24, 1992
    Date of Patent: January 12, 1993
    Assignee: The Lubrizol Corporation
    Inventors: Richard Yodice, Allan C. Clark