Patents by Inventor William Dvonch

William Dvonch 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).

  • Enkephalin degrading enzyme inhibitors
    Patent number: 4380535
    Abstract: Compounds which inhibit the brain enzyme degradation of enkephalins and which exhibit their own analgesic effect, having the formula ##STR1## wherein R.sub.1 is hydrogen or lower alkyl; X is hydrogen, hydroxy, halo, nitro, amino or lower alkoxy; R.sub.2 is hydrogen or ##STR2## wherein R.sub.3 is lower alkyl and R.sub.4 is L- or D-Thz or Pro, and the pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: September 23, 1981
    Date of Patent: April 19, 1983
    Assignee: American Home Products Corporation
    Inventors: Dimitrios Sarantakis, William Dvonch
  • Antitumor derivatives of periodate-oxidized cytidine
    Patent number: 4041037
    Abstract: The reaction of the periodate oxidation product from inosine, adenosine, or cytidine with methanol or ethanol affords a product having activity against lymphocytic leukemia P388 in mice.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: August 9, 1977
    Assignee: American Home Products Corporation
    Inventors: William Dvonch, Harvey E. Alburn
  • Antitumor derivatives of periodate-oxidized nucleosides
    Patent number: 4000137
    Abstract: The reaction of the periodate oxidation product from inosine, adenosine, or cytidine with methanol or ethanol affords a product having activity against lymphocytic leukemia P388 in mice.
    Type: Grant
    Filed: June 10, 1975
    Date of Patent: December 28, 1976
    Assignee: American Home Products Corporation
    Inventors: William Dvonch, Harvey E. Alburn
  • Cephalosporin isocyanates
    Patent number: 3932391
    Abstract: Novel penicillin and cephalosporin isocyanates are described which are useful intermediates for reaction with compounds containing an active hydrogen to produce penicillin and cephalosporin derivatives having activity against gram positive and/or gram negative bacteria.
    Type: Grant
    Filed: October 2, 1972
    Date of Patent: January 13, 1976
    Assignee: American Home Products Corporation
    Inventors: Harvey E. Alburn, William Dvonch