Patents by Inventor William Woodford Willis, Jr.

William Woodford Willis, Jr. 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).

  • Detergent containing lithium metal having improved dispersancy and deposit control
    Patent number: 6235688
    Abstract: Non-thixotropic, sodium-free lubricant additive having from 10% to 50% of a liquid organic diluent and from 30% to 90% of a substituted hydrocarbaryl metal salt. At least 30 mole percent of the metal in the metal salt is lithium, and the salt is essentially free of sodium. The BN of the non-thixotropic lubricant additive attributable to the lithium is less than 150. This additive is useful for decreasing black sludge deposits and piston deposits.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: May 22, 2001
    Assignee: Chevron Chemical Company LLC
    Inventors: Vernon R. Small, Jean-Louis Le Coent, Gerrit J. Polhaar, Ita Suharti Suwandi, William Woodford Willis, Jr.
  • Methods for preparing normal and overbased phenates
    Patent number: 5677270
    Abstract: Processes for preparing normal and overbased metal sulfurized alkylphenates. The processes am characterized by a sulfurization reaction using a lower carboxylic acid catalyst which does not use a polyol promoter, e.g., ethylene glycol. The process affords a metal sulfurized phenate product which is essentially free of polyol oxidation products. The products are useful as additives for lubricating oils.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: October 14, 1997
    Assignee: Chevron Chemical Company
    Inventors: Vernon R. Small, Jr., William Woodford Willis, Jr., John McDonald, Torrey A. Pennebaker, Jean Louis Le Coent