Patents by Inventor David M. Ritchie

David M. Ritchie 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).

  • 6-7-dimethoxy-1,2-dihydro-2-arylquinazoline-3-oxides
    Patent number: 5030635
    Abstract: Novel 6,7-dimethoxy-1,2-dihydro-2-arylquinazoline-3-oxides and their synthesis are described. These novel compounds are cardiotonic agents and bronchodilating agents, and as such are useful for the treatment of heart failure and asthma.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: July 9, 1991
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Donald W. Combs, Robert Falotico, David M. Ritchie
  • 6,7-dimethoxy-1,2-dihydro-2-arylquinazoline-3-oxides
    Patent number: 4963554
    Abstract: Novel 6,7-dimethoxy-1,2-dihydro-2-arylquinazoline-3-oxides and their synthesis are described. These novel compounds are cardiotonic agents and bronchodilating agents, and as such are useful for the treatment of heart failure and asthma.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: October 16, 1990
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Donald W. Combs, Robert Falotico, David M. Ritchie