Patents by Inventor Sie-Ta R. Han

Sie-Ta R. Han 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).

  • Waterproof high-SPF sunscreen compositions
    Patent number: 5204090
    Abstract: Sunscreen compositions which are waterproof and have high-SPF values comprise a water insoluble film-forming polymer, a polyoxypropylene ether of straight or branched chain alcohol (the emollient/solvent) and a sunscreen component containing at least one UVB type sunscreen and/or at least one UVA type sunscreen in a topical vehicle, preferably in the form of an alcoholic gel. In particular, the combination of a polyoxyalkylene ether of a straight or branched chain alcohol, a carboxylated acrylic copolymer and a sunscreen agent yields waterproof, high-SPF compositions.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: April 20, 1993
    Assignee: Bristol Myers Squibb
    Inventor: Sie-Ta R. Han