Patents by Inventor Yuichi Isowaki

Yuichi Isowaki 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).

  • Oxidized-type glutathione alkyl ester
    Patent number: 5223488
    Abstract: Presented are an oxidized-type glutathione alkyl ester represented by the formula (I). ##STR1## wherein R denotes a lower alkyl group, and a salt thereof: a method of preparing said ester which is comprised of oxidizing a reduced-type glutathione monoalkyl ester represented by the formula (II), ##STR2## wherein R is as defined above, with the air, hydrogen peroxide or iodine in an aqueous solution: and a pharmaceutical composition and method for suppression of hepatic disorders characterized in that it contains as an active constituent said ester or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: December 27, 1991
    Date of Patent: June 29, 1993
    Assignee: Senju Pharmaceutical Company, Ltd.
    Inventors: Kazumi Ogata, Takahiro Sakaue, Yuichi Isowaki, Hideki Tsuruoka