Patents by Inventor Yoshikazu Oka

Yoshikazu Oka 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).

  • 1,3-BENZOXAZINE DERIVATIVES
    Patent number: 4035363
    Abstract: Novel compounds of the formula ##STR1## wherein R.sup.1 is lower alkyl, R.sup.2 is hydrogen, lower alkyl or lower alkenyl, R.sup.3 is hydrogen, lower alkyl, lower alkoxy or halogen and Y is lower alkylene.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: July 12, 1977
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshikazu Oka, Mitsumi Tomimoto, Sukehiro Chiba