Patents by Inventor Tsuyoshi Ohgiku

Tsuyoshi Ohgiku 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).

  • Butadiene derivatives and process for preparing thereof
    Patent number: 6248743
    Abstract: A novel butadiene derivative of the formula: wherein Ring A is heterocycle, or benzene being optionally substituted by lower alkyl, alkoxy, nitro, hydroxy, substituted or unsubstituted amino or halogen, Ring B is heterocycle, or benzene being optionally substituted by lower alkoxy, lower alkylenedioxy or di-lower alkylamino, R1 and R2 are each H or lower alkyl, one of —COR32 and —COR42 is carboxyl, and the other is carboxyl being optionally esterified, or the corresponding amide or pyrrolidine derivatives, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: June 19, 2001
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Hiroshi Ohmizu, Akio Ohtani, Tsuyoshi Ohgiku, Hiroshi Sai, Jun Murakami