Patents by Inventor Hisatoshi Shimizu

Hisatoshi Shimizu 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).

  • Permanent waving composition
    Patent number: 4139610
    Abstract: Permanent waving composition containing as active ingredients cysteine and N-acetylcysteine. The composition contains preferably 3-15% cysteine and 0.2-3% N-acetylcysteine. It is possible to avoid the separation of crystals derived from the air-oxidation of cysteine by the composition of the present invention.
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: February 13, 1979
    Assignee: Kyowa Hakko Kogyo Kabushiki Kaisha
    Inventors: Yoshimasa Miyazaki, Shigeru Matsumura, Takayoshi Yamauchi, Morio Harada, Hisatoshi Shimizu