Patents by Inventor Sophia L. Wang

Sophia L. Wang 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).

  • Composition and method for lubricant wax dispersant and pour point improver
    Patent number: 6174843
    Abstract: This invention provides a composition and a method of using the composition for dispersing wax and improving the pour point of lubricating oils. The composition comprises an esterified styrene-maleic anhydride copolymer and an esterified alpha-olefin maleic anhydride copolymer.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: January 16, 2001
    Assignee: Nalco Chemical Company
    Inventors: Kim B. Peyton, Sophia L. Wang
  • Corrosion inhibitor for alcohol and gasohol fuels
    Patent number: 5024677
    Abstract: Rust of ferrous metal surfaces that are in contact with gasohol or alcohol fuels is inhibited by the addition of a corrosion inhibiting amount of the combination of (A) a substituted imidazoline and (B) an alkenyl succinimide of a mixture of alkylenepolyamines.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: June 18, 1991
    Assignee: Nalco Chemical Company
    Inventors: Sophia L. Wang, George R. Meyer, Kerry C. Brinkman