Patents by Inventor Tokuro Ohishi

Tokuro Ohishi 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).

  • Patent number: 4324800
    Abstract: A compound of the formula: ##STR1## wherein R is alkanoyl of one to 20 carbon atoms, benzoyl or lower alkyl-benzoyl, and processes for preparation thereof are disclosed. Said compound (I) and a pharmaceutically acceptable acid addition salt thereof are useful as a cardiotonic agent.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: April 13, 1982
    Assignee: Tanabe Seiyaku Co., Ltd.
    Inventors: Norihide Umino, Tokuro Ohishi, Muneyoshi Ikezaki, Masanori Sato, Taku Nagao