Patents by Inventor Robert Walter Humphrey

Robert Walter Humphrey 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).

  • Power transmitting fluids of improved antiwear performance
    Patent number: 6262000
    Abstract: The antiwear performance of power transmitting fluids, particularly continuously variable transmission fluids, is improved by incorporating an additive combination of amine phosphates, organic polysulfides, zinc salts of phosphorothioic acid esters and optionally a friction modifier.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: July 17, 2001
    Assignee: Exxon Chemical Patents Inc
    Inventors: Philip Reeve, Neville J Carter, Robert Walter Humphrey, Donald Glenn Young
  • Lubricating oil compositions
    Patent number: 3966621
    Abstract: The preparation of overbased Group II metal sulphurized phenates by reacting the metal base, a sulphurized phenol or phenol sulphur mixture a diol and an alcohol in oil over a controlled temperature cycle, introducing carbon dioxide to the mixture when the temperature is less than 140.degree.C and the water present in the mixture has been reduced to below 0.3% by weight of the mixture.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: June 29, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert Charles Watkins, Derek Alfred Kinghan, Robert Walter Humphrey