Patents by Inventor Gary E. Zuber

Gary E. Zuber 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).

  • N-t-butyl-androst-3,5-diene-17.beta.-carboxamide-3-carboxylic acid polymorph A
    Patent number: 5596109
    Abstract: The invention describes a process for the preparation of the polymorph A form of a compound having the structure ##STR1## which involves triturating, crystallizing, or precipitating crude N-t-butyl-androst-3,5-diene-17.beta.-carboxamide-3-carboxylic acid from an ethyl acetate or t-butyl methyl ether solvent, followed by isolation of the polymorph A.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: January 21, 1997
    Assignee: SmithKline Beecham Corporation
    Inventors: Neil H. Baine, Neville L. Holder, Donald N. Klein, Robert L. Webb, Gary E. Zuber