Patents by Inventor David J. MacThur

David J. MacThur 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).

  • Lubricating Oil Composition
    Publication number: 20110041797
    Abstract: A crankcase lubricating oil composition comprising: (A) an oil of lubricating viscosity in a major amount; (B) as an additive component in a minor amount, an oil-soluble metal salt of a dithiophosphoric acid; (C) as an additive component in a minor amount, an oil-soluble carbodiimide compound; and, wherein the lubricating oil composition is contaminated with at least 0.3 mass %, based on the total mass of the lubricating oil composition, of a biofuel or a decomposition product thereof and mixtures thereof.
    Type: Application
    Filed: August 17, 2010
    Publication date: February 24, 2011
    Inventors: Keith Strickland, Stuart J. McTavish, Katherine M. Richard, David J. MacThur