Patents by Inventor Gilbert Duperray

Gilbert Duperray 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).

  • Composition for improving adhesion of vinylidene polyfluoride and non-compatible polymeric resins
    Patent number: 5242976
    Abstract: A composition is provided which is coextrudable with vinylidene polyfluoride permitting it to adhere to incompatible polymeric resins, the composition which has a base of an alkyl polymethacrylate and a thermoplastic polymer is comprised of:from 27 to 50 parts by weight of an alkyl polymethacrylate; andfrom 73 to 50 parts by weight of an additive itself constituted for 100 portions by weight of additive of:from 35 to 50 parts by weight of PVDF, andfrom 65 to 50 parts by weight of acrylic or methacrylic elastomer.This composition serves to produce vinylidene polyfluoride compounds capable of coating polymers which are non-compatible with vinylidene polyfluoride. When used as an adhesion agent, one can obtain by coextrusion, compounds of vinylidene polyfluoride and polymers non-compatible with the vinylidene polyfluoride.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: September 7, 1993
    Assignee: Societe Atochem
    Inventors: Albert Strassel, Gilbert Duperray, Philippe Rocher
  • Polyvinylidene fluoride composite and method
    Patent number: 5112692
    Abstract: A composite material comprising a polyvinylidene fluoride layer, a substrate of a material that does not adhere to polyvinylidene fluoride, and an intermediate layer between said fluoride layer and substrate comprising a blend of polyvinylidene fluoride and a polymer containing carbonyl groups, ##STR1## in its polymer chain; the subject blend, and the process of treating a surface to adhere polyvinylidene fluoride thereto.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: May 12, 1992
    Assignee: Atochem
    Inventors: Albert Strassel, Gilbert Duperray
  • Polyvinylidene fluoride products with a surface adapted to adhere to an incompatible polymer and process for treating the surface of a polyvinylidene fluoride material to enable it to adhere to an incompatible polymer
    Patent number: 5019444
    Abstract: A polyvinylidene fluoride product having at least one surface with improved adhesion to an incompatible polymer, said at least one surface covered with a porous polyvinylidene fluoride layer adhered thereto without a bonding intermediate, the process of forming the polyvinylidene fluoride product, and laminates thereof with non-adherent polymers.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: May 28, 1991
    Assignee: Atochem
    Inventors: Gilbert Duperray, Daniel Wolff
  • Molded preformed polytetrafluoroethylene structures
    Patent number: 4267237
    Abstract: Molded preformed polytetrafluoroethylene structures are comprised of at least one preformed section. The homogeneous PTFE section yields a unitary non-homogeneous polytetrafluoroethylene structure when isostatically molded together with either polytetrafluoroethylene powders or polytetrafluoroethylene preformed sections.
    Type: Grant
    Filed: April 17, 1979
    Date of Patent: May 12, 1981
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Gilbert Duperray, Andre A. Monnet, Claude Tournut
  • Method of molding polytetrafluoroethylene
    Patent number: 4102966
    Abstract: Method of molding granular polytetrafluoroethylene powder which comprises compressing the powder in a mold at a pressure of between about 10 and 50 bars to form a preform and subjecting the preform to isostatic molding at a pressure of between about 100 and 1000 bars.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: July 25, 1978
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Gilbert Duperray, Andre Monnet, Claude Tournut