Patents by Inventor Jean-Henri Durand

Jean-Henri Durand 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).

  • Bath and process for the chemical conversion of metal substrates with zinc
    Patent number: 4668307
    Abstract: Chemical conversion bath with zinc characterized by the fact that it comprises, besides the conventional constituents, an effective amount of fluorophosphate ion of the formula:F--PO.sub.3.sup.2-which can be introduced in the form of the corresponding acid, one of its alkali, alkaline-earth or ammonium salts or its zinc salt.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: May 26, 1987
    Assignee: Compagnie Francaise de Produits
    Inventors: Joseph Schapira, Victor Ken, Christian Hoessler, Louis Cot, Jean-Henri Durand, Patrice Pelletier
  • Process for treatment of metallic surfaces by means of fluorophosphate salts
    Patent number: 4153478
    Abstract: Steel, aluminum and aluminum alloys, zinc and zinc alloys are treated to improve corrosion resistance with an aqueous solution of a fluorophosphate salt to passivate the metal surface, before or after phosphatizing and prior to painting.
    Type: Grant
    Filed: February 15, 1978
    Date of Patent: May 8, 1979
    Assignee: The Diversey Corporation
    Inventors: Bernard Parant, Louis Cot, William Granier, Jean-Henri Durand
  • Compositions for treatment of metallic surfaces by means of fluorophosphate salts
    Patent number: 4132572
    Abstract: Steel, aluminum and aluminum alloys, zinc and zinc alloys are treated to improve corrosion resistance with an aqueous solution of a fluorophosphate salt to passivate the metal surface, before or after phosphatizing and prior to painting.
    Type: Grant
    Filed: April 21, 1977
    Date of Patent: January 2, 1979
    Assignee: The Diversey Corporation
    Inventors: Bernard Parant, Louis Cot, William Granier, Jean-Henri Durand