Patents by Inventor Norihisa Ishikawa

Norihisa Ishikawa 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).

  • Phenoxyalkylcarboxylic acid derivatives and process of preparing the same
    Patent number: 5290812
    Abstract: Phenoxyalkylcarboxylic acid derivatives represented by the following formula (I) ##STR1## having a strong and selective leukotriene antagonistic action and useful for prophylaxis and therapy of allergic diseases as asthma and processes of preparing the same.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: March 1, 1994
    Assignee: Kyorin Pharmaceutical Co., Ltd.
    Inventors: Mitsuo Ohashi, Toshio Tanaka, Norihisa Ishikawa, Tetsuya Kishi