Patents by Inventor Andre Champagnac

Andre Champagnac 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).

  • Analgesic drug containing a derivative of benzylpiperazine
    Patent number: 4382935
    Abstract: The drug contains an active substance consisting of 1-(3'-benzofuryl)-4-benzylpiperazine. In order to prepare the compound, a reaction is carried out with reflux between 3-coumaranone and N-benzylpiperazine in the presence of acetic acid and in an aromatic solvent.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: May 10, 1983
    Assignees: Andre Buzas, Jean-Marie Melon, Laboratoires Sauba S.A., Universite d'Orleans
    Inventors: Andre Buzas, Jean-Marie Melon, Gilbert Lavielle, Andre Champagnac