Patents by Inventor Olivier Sagnes

Olivier Sagnes 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).

  • Conductive materials based on encapsulated conductive polymers
    Patent number: 5523021
    Abstract: This invention concerns conductive materials based on an encapsulated conductive polymer. Encapsulation in a shell of polymer stabilizes the conductivity of these materials, which can be encapsulated in a shell of film-generating polymer, to give the material formed very good mechanical properties, unlike conductive polymers which existed in the prior art, which, if not encapsulated, form brittle materials that are less stable in time.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: June 4, 1996
    Assignee: Thomson-CSF
    Inventors: Florence Epron, Francois Henry, Olivier Sagnes, Jean-Claude Dubois
  • Conductive materials based on encapsulated conductive polymers
    Patent number: 5417890
    Abstract: A material based on a conductive polymer consisting of particles of conductive polymer (P.sub.0), each particle being wrapped in a shell of water-insoluble, cross-linked polymer (P.sub.1).
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: May 23, 1995
    Assignee: Thomson-CSF
    Inventors: Florence Epron, Francois Henry, Olivier Sagnes, Jean-Claude Dubois
  • Process to produce polyparaphenylene vinylene or polyparathienylene vinylene polymers
    Patent number: 5384392
    Abstract: The invention is a new process to produce polyparaphenylene vinylene or polyparathienylene vinylene polymers using a sulfonium-based polyelectric precursor. This precursor is treated directly with acid to obtain the polymers required. These polymers have high molecular weights and are particularly advantageous in the plastics transformation field.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: January 24, 1995
    Assignee: Thomson-CSF
    Inventors: Olivier Sagnes, Jean-Claude DuBois, Valerie Massardier, Tran van Hoang, Alain Guyot
  • Method for obtaining composite conductive materials based on conductive polymers, with controlled dielectrical properties
    Patent number: 5356660
    Abstract: Disclosed is a method to obtain a film of composite material based on particles of conductive polymer, stabilized by a highly steric or highly ionic surfactant. The efficient stabilization of the particles makes it possible to control the progress of the dielectrical properties of the materials as a function of the conductive entity content, leading to the preparation of films with variable impedance. The method can be applied to the making of coatings that meet goals related to electromagnetic wide-band attenuation. FIG. 2 .
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: October 18, 1994
    Assignee: Thomson-CSF
    Inventors: Philippe Michel, Marie Vergnolle, Olivier Sagnes
  • Method for the obtaining of polymers with thermally stable conductivity
    Patent number: 5304335
    Abstract: Disclosed is a novel method for obtaining conductive polymers enabling their conductive to be increased and thermally stabilized. The polymers are obtained by oxidative chemical process in the presence of a codopant, the anions of which are more stable than the oxidating anions. The synthesis of the polymer is furthermore followed by a thermal treatment operation by which the conductivity of the material obtained is stabilized. Application: microwave absorbents.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: April 19, 1994
    Assignee: Thomson-CSF
    Inventors: Olivier Sagnes, Philippe Michel