Patents by Inventor Ota Masako

Ota Masako 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).

  • Ointment base
    Patent number: 4983385
    Abstract: An ointment base which comprises:(a) a hydrogel formed by a water-soluble polymer and a material selected from the group consisting of water, a polyhydric alcohol and a mixture thereof;(b) a methacrylate copolymer selected from a group consisting of dimethylaminoethyl methacrylate/methyl methacrylate copolymer, ethyl methacrylate/chlorotrimethylammonium ethyl methacrylate copolymer or a mixture thereof; and(c) a solubilizer which dissolves the methacrylate copolymer but is incompatible with water and the polyhydric alcohol,a weight ratio of the methacrylate copolymer to the solubilizer being 1:2-1:25.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: January 8, 1991
    Assignees: Sunstar Kabushiki Kaisha, Lederle (Japan), Ltd.
    Inventors: Kenji Hasegawa, Nakashima Nakashima, Toru Eguchi, Ota Masako