Patents by Inventor Shinkichi Hatae

Shinkichi Hatae 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).

  • Compositions for topical use having melanin synthesis-inhibiting activity
    Patent number: 4919921
    Abstract: Compositions for topical use having melanin synthesis-inhibiting activity comprising kojic acid or its esters and vitamin C or its derivatives. The compositions have excellent human skin-whitening effect and anti-suntan effect.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: April 24, 1990
    Assignee: Sansho Seiyaku Co., Ltd.
    Inventor: Shinkichi Hatae
  • Method of minimizing erythema and elastosis
    Patent number: 4891361
    Abstract: Drugs containing, as an effective ingredient, kojic acid or kojic acid/.beta.-cyclodextrin inclusion complex are effective in preventing elastosis in an animal test using Spraguex-Dawley rats. The drugs also have powerful action to inhibit the formation of melanin, and show an outstanding color fading effect in a culture test using mouse melanoma B16 cells. The drugs have very low toxicity and are externally applied in the form of an ointment, cream, emulsion, pack or solution.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: January 2, 1990
    Assignee: Sansho Seiyaku Co., Ltd.
    Inventor: Shinkichi Hatae
  • Whitening cosmetic
    Patent number: 4847074
    Abstract: A whitening cosmetic comprises kojic acid and cyclodextrins in addition to cosmetic base materials. The kojic acid may be included in cyclodextrins before being incorporated into the cosmetic. The cosmetic has an improved stability against coloring with the passage of time and an enhance whitening effect. The cosmetic can be a toilet lotion, a cosmetic cream, a milky lotion, a pack, etc., for application to human skin.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: July 11, 1989
    Assignee: Sansho Seiyaku Co., Ltd.
    Inventors: Shinkichi Hatae, Kazuo Nakashima