Patents by Inventor John P. Tengi

John P. Tengi 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).

  • .beta.-Lactamase inhibitors
    Patent number: 4393003
    Abstract: A .beta.-lactamase inhibitor of the formula ##STR1## and the pharmaceutically acceptable salts thereof are presented. Also presented are intermediates and synthetic processes for the manufacture of the formula I compound.The compound inhibits the activity of enzymes which inactivate certain .beta.lactam antibiotics.
    Type: Grant
    Filed: April 8, 1981
    Date of Patent: July 12, 1983
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Dennis D. Keith, John P. Tengi, Manfred Weigele