Patents by Inventor Philip D. Heppner

Philip D. Heppner 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).

  • Patent number: 6194425
    Abstract: Imidazonaphthyridine and tetrahydroimidazonaphthyridine compounds induce the biosynthesis of cytokines such as interferon and tumor necrosis factor. The compounds exhibit antiviral and antitumor properties. Methods of preparing the compounds and intermediates useful in the preparation of the compounds are also disclosed.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: February 27, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: John F. Gerster, Kyle J. Lindstrom, Stephen L. Crooks, Philip D. Heppner, Gregory J. Marszalek, Peter V. Maye, Bryon A. Merrill, John W. Mickelson, Michael J. Rice