Patents by Inventor Takihisa Chiba

Takihisa Chiba 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).

  • Antihypertensive 5-substituted 2-pyrrolidinecarboxylic acids
    Patent number: 4264620
    Abstract: Derivatives of 5-substituted 2-pyrrolidinecarboxylic acid which have the general formula ##STR1## are useful in compositions as antihypertensive agents.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: April 28, 1981
    Assignee: Santen Pharmaceutical Co., Ltd.
    Inventors: Jun-ichi Iwao, Masayuki Oya, Eishin Kato, Yoichi Kawashima, Hiroshi Masuda, Tadashi Iso, Takihisa Chiba