Patents by Inventor Akimoto Ohnishi

Akimoto Ohnishi 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).

  • Novel pyrimidopyrimidine derivative, process for producing it and pharmaceutical composition
    Patent number: 4886807
    Abstract: Pyrimidopyrimidine derivatives having the general formula ##STR1## wherein R.sub.1 is an alkyl group;R.sub.2 is an alkyl or phenyl group;R.sub.3 is a hydrogen atom, an alkyl or lower alkylamino group; andR.sub.4 is a hydrogen atom, an alkyl, halogenated lower alkyl, phenyl, amino or lower alkylamino group;and pharmaceutically acceptable salts thereof. These compounds are useful as anti-allergic agents, for example, for the treatment of bronchial asthma, urticaria, allergic rhinitis, allergic dermatoses or allergic conjunctivitis.
    Type: Grant
    Filed: November 29, 1988
    Date of Patent: December 12, 1989
    Assignee: Nippon Zoki Pharmaceutical Co., Ltd.
    Inventors: Norihiko Kitamura, Akimoto Ohnishi