Patents by Inventor Charles-Henri Vincent

Charles-Henri Vincent 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).

  • Process for preparing hexahydropyridazine-3-carboxylic acid derivatives
    Patent number: 7132535
    Abstract: According to the process of the invention, the hexahydropyridazine-3-carboxylic acid derivatives are prepared by reacting a compound of formula (II) with a compound of formula (III) in the presence of a base with a pK of greater than or equal to 8.5, in a ketone organic solvent, to obtain an intermediate compound that is not isolated and that is treated with a basic aqueous medium. By means of this process, the derivatives are obtained more quickly and more economically.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: November 7, 2006
    Assignee: Isochem
    Inventors: Hervé Lhermitte, Charles-Henri Vincent, Christian Picherit
  • Process for preparing hexahydropyridazine-3-carboxylic acid derivatives
    Publication number: 20040210053
    Abstract: According to the process of the invention, the hexahydropyridazine-3-carboxylic acid derivatives are prepared by reacting a compound of formula (II) 1
    Type: Application
    Filed: April 15, 2004
    Publication date: October 21, 2004
    Inventors: Herve Lhermitte, Charles-Henri Vincent, Christian Picherit