Patents by Inventor Robert Anthony Fletcher

Robert Anthony Fletcher 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 composition
    Patent number: 6022835
    Abstract: A lubricating composition comprising a base oil in combination with molybdenum dithiocarbamate, zinc naphthenate and one or more metal dithiophosphates, and optionally one or more metal dithiocarbamates. A lubricating grease comprising such a composition in combination with a thickener, is particularly suitable for lubricating constant velocity joints.
    Type: Grant
    Filed: October 12, 1998
    Date of Patent: February 8, 2000
    Assignee: Shell Oil Company
    Inventor: Robert Anthony Fletcher
  • Lubricating grease
    Patent number: 5650380
    Abstract: A lubricating composition is disclosed comprising a base oil of mineral and/or synthetic origin in combination with molybdenum disulfide, zinc naphthenate and one or more metal dithiophosphates, and optionally one or more metal dithiocarbamates. A lubricating grease comprising such a composition in combination with a thickener, which may be a urea compound, a simple lithium soap or a lithium complex, is particularly suitable for lubricating constant velocity joints such as constant velocity ball joints.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: July 22, 1997
    Assignee: Shell Oil Company
    Inventor: Robert Anthony Fletcher