Patents by Inventor Sandra S. Davis

Sandra S. Davis 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).

  • Sunscreen compositions containing copolymers of isoprene butadiene and/or styrene to provide improved water resistance
    Patent number: 6312672
    Abstract: The invention provides waterproof sunscreen compositions which include polymers of isoprene, butadiene and/or styrene, particularity conjugated dienes which may be subject to some degree of hydrogenation. A copolymer of two different conjugated dienes is preferred. The polymers may be selectively hydrogenated to produce polymers which have highly controlled amounts of unsaturation, thereby improving water resistancy.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: November 6, 2001
    Assignee: Exxon Mobil Chemical Patents Inc.
    Inventors: Thomas S. Coolbaugh, Sandra S. Davis, John E. Marlin, II, Demetreos N. Matthews, Fahimeh P. Shirazi