Patents by Inventor Yasuo Kikugawa

Yasuo Kikugawa 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).

  • Preparation process of acemetacin
    Patent number: 4603210
    Abstract: A process for preparing acemetacin which process comprises removing a protecting group, which is other than tetrahydropyranyl group and is removable under acidic conditions, from an acemetacin ester represented by the formula ##STR1## wherein R means the protecting group, under the acidic conditions.
    Type: Grant
    Filed: April 11, 1984
    Date of Patent: July 29, 1986
    Assignees: Troponwerke GmbH & Co. KG., Kowa Company
    Inventors: Yasuo Kikugawa, Yoshinori Kyotani