Patents by Inventor Jean Pierre Gaston Lefevre

Jean Pierre Gaston Lefevre 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).

  • Vincaminic acid amides
    Patent number: 4011330
    Abstract: The invention provides compounds of formula ##STR1## wherein A and B are hydrogen and R is hydrogen or cycloalkyl, or A and B together form an additional bond and R is cycloalkyl or cycloalkyl-alkyl. Useful in treating pathological disturbancies involving an anoxia factor.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: March 8, 1977
    Assignee: Synthelabo
    Inventors: Don Pierre Rene Lucien Giudicelli, Henry Najer, Patrick Andre Louis Lardenois, Jean Pierre Gaston Lefevre, Bogdan Iliesco-Branceni, Icilio Angelo Girolamo Cavero
  • Process for the preparation of cis-vincamine
    Patent number: 3950345
    Abstract: A process is provided for the preparation of cis-vincamine by oxidising trans-vincamine with tertiary butyl hypochlorite to obtain dehydrovincamine chloride, reducing the dehydrovincamine chloride with a metal in an aqeous acidic medium and neutralising the product, and separating cis-vincamine from the resulting mixture of cis- and trans-vincamines. Cis-vincamine is useful for the treatment of circulatory disorders.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: April 13, 1976
    Assignee: Synthelabo
    Inventors: Henry Najer, Yves Robert Alain Pascal, Jean Pierre Gaston Lefevre