Patents by Inventor Yoichi Ohba

Yoichi Ohba 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).

  • Pyrazole derivatives and their pharmaceutical use
    Patent number: 5849779
    Abstract: The present invention relates to a pyrazole derivative represented by formula (I) or (II) ##STR1## wherein R.sup.1 is hydrogen C2-C6 alkyl benzyl or phenyl; each of R.sup.2 and R.sup.3 is hydrogen, C1-C6 alkyl or benzyl; each of R.sup.4 and R.sup.5 is hydrogen, C1-C6 alkyl, C3-C6 alkenyl, C3-C8 cycloalkyl, benzyl or phenyl;X is oxygen or sulfur;R.sup.5 is hydrogen, C2-C6 alkyl, C3-C6 alkenyl, C3-C8 cycloalkyl or benzyl when R.sup.1 is benzyl, R.sup.2 is ethyl, R.sup.3 is hydrogen, and R.sup.4 is hydrogen, and its pharmaceutical use.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: December 15, 1998
    Assignee: Japan Energy Corporation
    Inventors: Kohsaku Hirota, Hironao Sajiki, Yoshiaki Isobe, Yoichi Ohba, Hiroyuki Morita, Haruo Takaku, Nobuyoshi Chiba