Patents by Inventor Charles L. Zirkle

Charles L. Zirkle 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-Substituted pyrrolidineacetic acids and their esters
    Patent number: 4514414
    Abstract: N-Substituted pyrrolidineacetic acids and their esters, useful as inhibitors of GABA uptake, are prepared by reacting an appropriate N-alkylating derivative with an esters of an N-unsubstituted pyrrolidineacetic acid followed by hydrolysis of the ester.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: April 30, 1985
    Assignee: Smithkline Beckman Corporation
    Inventors: William E. Bondinell, John J. Lafferty, Charles L. Zirkle
  • Inhibition of GABA uptake by N-substituted azaheterocyclic carboxylic acids and their esters
    Patent number: 4383999
    Abstract: N-Substituted azaheterocyclic carboxylic acids and their esters, useful as inhibitors of GABA uptake, are prepared by reacting an appropriate N-alkylating derivative with an ester of an N-unsubstituted azaheterocyclic carboxylic acid followed by hydrolysis of the ester.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: May 17, 1983
    Assignee: Smithkline Beckman Corporation
    Inventors: William E. Bondinell, John J. Lafferty, Charles L. Zirkle
  • 3-Aminoindazole derivatives
    Patent number: RE28939
    Abstract: .Iadd.Pharmaceutical compositions having muscle relaxant and analgesic activity containing 3-aminoindazoles..Iaddend.
    Type: Grant
    Filed: September 28, 1972
    Date of Patent: August 24, 1976
    Assignee: SmithKline Corporation
    Inventors: John J. Lafferty, David H. Tedeschi, Charles L. Zirkle