Patents by Inventor Muneyoshi Ishikawa

Muneyoshi Ishikawa 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).

  • Pharmaceutical compositions and suppository
    Patent number: 4784855
    Abstract: A pharmaceutical composition for suppository which comprises buprenorphine or its pharmaceutically acceptable acid addition salt as the active ingredient and a mixed base composed of 70 to 95 wt. % of polyethylene glycol with average molecular weight of 200 to 20,000 and 30 to 5 wt. % of propylene glycol.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: November 15, 1988
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Chikamasa Yamashita, Kouzo Ishida, Gohachiro Miyamoto, Muneyoshi Ishikawa