Patents by Inventor Nancy Diggs

Nancy Diggs 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: 20060276353
    Abstract: A method of improving the seal compatibility and/or copper corrosion performance of lubricating oil compositions for the lubrication of the crankcases of an internal combustion engine, which method includes the step of adding to the lubricating oil compositions a minor amount of a non-hydrogenated (unsaturated) olefin polymer. Also described are lubricating oil compositions for engines and transmissions, which compositions contain sulphur and/or a salicylate soap and a minor amount of a non-hydrogenated (unsaturated) polymer, which compositions are compatible with nitrile rubber engine and transmission seals and copper-containing engine and transmission components.
    Type: Application
    Filed: May 31, 2006
    Publication date: December 7, 2006
    Inventors: Matthew Irving, Robin Scott, Nancy Diggs, Jose Gutierrez, Michael Alessi
  • Soot dispersants and lubricating oil compositions containing same
    Publication number: 20060189492
    Abstract: Linked aromatic compounds found to act as potent soot dispersants in lubricating oil compositions; lubricating oil compositions containing such soot dispersants and precursor compounds from which the soot dispersants are derived.
    Type: Application
    Filed: February 18, 2005
    Publication date: August 24, 2006
    Inventors: Tushar Bera, Nancy Diggs, Rolfe Hartley, Jacob Emert, Michael Alessi, Jun Hua
  • Lubricating oil composition
    Publication number: 20050130852
    Abstract: Lubricating oil compositions providing superior soot dispersing characteristics, which contain a combination of a high molecular weight dispersant and a soot dispersant comprising a linked aromatic oligomer
    Type: Application
    Filed: April 26, 2004
    Publication date: June 16, 2005
    Inventors: Antonio Gutierrez, Ricardo Bloch, Nancy Diggs, Fredrick Girschick, David Martella, Mark Stevens, Jacob Emert