Patents by Inventor Annette M. Belton

Annette M. Belton 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).

  • Rhodium containing catalyst and use thereof in preparation of 6-deoxy-5-oxytetracycline
    Patent number: 3962131
    Abstract: Catalyst produced by the process of reacting 1 mol of rhodium trichloride and 2 mols of sodium acetate in methanol at a temperature from about 50.degree.C. to the reflux temperature of said reaction mixture, then reacting resulting reaction mixture with 2 mols of triphenylphosphine at a temperature of from about 50.degree.C. to the reflux temperature of said reaction mixture and recovering resulting insoluble material and use thereof in hydrogenating 6-deoxy-6-demethy-6-methylene-5-oxytetracycline to obtain .alpha.-6-deoxy-5-oxytetracycline.
    Type: Grant
    Filed: January 28, 1975
    Date of Patent: June 8, 1976
    Assignee: Pfizer Inc.
    Inventors: Hermann Faubl, Annette M. Belton