Patents by Inventor Masaji Oono

Masaji Oono 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).

  • 3-Alkylidine azetidine compound and their production
    Patent number: 4511509
    Abstract: An azetidine derivative of the formula, ##STR1## wherein R is a hydrogen atom or a hydroxyl group, and R.sub.a, R.sub.b, R.sub.c, R.sub.a ', R.sub.b ' and R.sub.c ' are identical or different and each are a lower alkyl group.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: April 16, 1985
    Assignee: Kowa Co. Ltd.
    Inventors: Hamao Umezawa, Masaji Oono, Hiroshi Ishihama, Yoshinori Kyotani, Yoshio Takahashi