Patents by Inventor David J. Blythin

David J. Blythin 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).

  • 2,4-[1H,3H,5H]-(1)-Benzopyrano-[2,3-d]-pyrimidinediones and their use as anti-allergy agents
    Patent number: 4272535
    Abstract: Novel 2,4-(1H,3H,5H)-(1)benzopyrano-(2,3-d)-pyrimidinediones of the formula ##STR1## and their pharmaceutically acceptable salts are useful in the treatment of such diseases as asthma, allergic rhinitis, urticaria and ulcerative colitis.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: June 9, 1981
    Assignee: Schering Corporation
    Inventor: David J. Blythin