Patents by Inventor Douglas Barry Davis

Douglas Barry Davis 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).

  • 1-Oxides of Schiff bases of 6-aminopenicillanic acid
    Patent number: 3994912
    Abstract: Compounds containing a cephem nucleus are prepared by heating a 1-oxide of a Schiff base of 6-aminopenicillanic acid. These cephem compounds are useful as intermediates in the preparation of physiologically active cephalosporins.
    Type: Grant
    Filed: March 25, 1974
    Date of Patent: November 30, 1976
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Douglas Barry Davis, Ekkehard Bohme, Joseph Edward Dolfini