Patents by Inventor Rebecca C. Castle

Rebecca C. Castle 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: 20040235688
    Abstract: The use, in a minor amount, of a detergent composition comprising one or more metal detergents which comprises metal salts of organic acids, wherein the detergent composition comprises more than 50 mole %, based on the moles of the metal salts of organic acids in the detergent composition, of:
    Type: Application
    Filed: June 22, 2004
    Publication date: November 25, 2004
    Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
  • Lubricating oil composition
    Patent number: 6784143
    Abstract: The use, in a minor amount, of a detergent composition comprising one or more metal detergents which comprises metal salts of organic acids, wherein the detergent composition comprises more than 50 mole %, based on the moles of the metal salts of organic acids in the detergent composition, of: (I) a metal salt of an aromatic carboxylic acid, or (II) a metal salt of a phenol, or (III) both a metal salt of an aromatic carboxylic acid and a metal salt of a phenol, in a lubricating oil composition for improving the oxidation resistance of the lubricating oil composition, wherein the amount of phosphorus and sulfur in the oil composition is less than 0.09 mass % and at most 0.5 mass % respectively, based on the mass of the oil composition. It has also been found that a detergent composition comprising more than 50 mole % of a metal salt of an aromatic carboxylic acid improves the reduction in wear in an engine.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: August 31, 2004
    Assignee: Infineum International Ltd.
    Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy
  • Heavy duty diesel engine lubricating oil compositions
    Publication number: 20030134758
    Abstract: The use of an effective amount of one or more compounds capable of reducing friction coefficients under mixed lubrication or boundary lubrication conditions in a heavy duty diesel engine lubricating oil composition for improving the fuel economy of a heavy duty diesel engine.
    Type: Application
    Filed: December 12, 2002
    Publication date: July 17, 2003
    Inventors: Charles H. Bovington, Stephen Arrowsmith, Rebecca C. Castle, Peter Wrench
  • Lubricating oil composition
    Publication number: 20030096716
    Abstract: The use, in a minor amount, of a detergent composition comprising one or more metal detergents which comprises metal salts of organic acids, wherein the detergent composition comprises more than 50 mole %, based on the moles of the metal salts of organic acids in the detergent composition, of:
    Type: Application
    Filed: May 9, 2002
    Publication date: May 22, 2003
    Inventors: Christopher J. Locke, Mark G. Stevens, Peter Wrench, Stephen Arrowsmith, Rebecca C. Castle, Jane R. Galsworthy