Patents by Inventor Etienne Hannecart

Etienne Hannecart 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).

  • Substituted thiophenes, conducting polymers derived from these thiophenes, process for obtaining them and devices containing these polymers
    Patent number: 5132049
    Abstract: Substituted thiophenes of the general formula: ##STR1## in which: R represents a hydrogen atom, a halogen atom or an aliphatic group containing from 1 to 4 carbon atoms,X represents a hydrogen atom or a fluorine atom,Y represents an at least partially fluorinated aliphatic or aromatic group,m represents an integer equal to or greater than 2, andn represents an integer such that 0.ltoreq.n.ltoreq.7.The invention also relates to the electrically conducting polymers containing recurring units derived from monomers chosen from the substituted thiophenes.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: July 21, 1992
    Assignee: Solvay & Cie (Societe Anonyme)
    Inventors: Robert Garreau, Jean Roncali, Marc Lemaire, Hafsa Korri, Francis Garnier, Etienne Hannecart
  • Process for preparing a latex based on polypyrrole and use of this latex to form a conducting film
    Patent number: 5066706
    Abstract: Process for preparing a latex of polypyrrole in an aqueous reagent medium containing a ferric salt, a hydrolyzed polyvinyl acetate and a dodecyl sulphate.The films prepared with this conducting latex are homogeneous, adhere to metals and metallized glasses and have high conductivity.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: November 19, 1991
    Assignee: Solvay & Cie (Societe Anonyme)
    Inventors: Elise Destryker, Etienne Hannecart
  • Compositions based on vinylidene fluoride polymers, which have a reduced smoke-producing capacity
    Patent number: 5004773
    Abstract: Compositions based on vinylidene fluoride polymers, which have a reduced smoke-producing capacity, comprising, as smoke-reducing agent, an effective amount of a dialkyltin dicarboxylate.The compositions are very particularly suitable for the manufacture of shaped articles in the building and the aeronautical industries.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: April 2, 1991
    Assignee: Solvay & Cie (Societe Anonyme)
    Inventors: Anthony Simoens, Etienne Hannecart
  • Conductive polymers derived from 3-alkylthiophenes, a process for manufacturing them and electroconductive devices containing them
    Patent number: 4909959
    Abstract: The subject of the invention is mainly an electrically conductive polymer containing repeated units derived from 3-alkythiophenes in which the alkyl substituent contains from six to nine carbon atoms.The invention also relates to a process for manufacturing these polymers and to electroconductive devices containing them.
    Type: Grant
    Filed: April 1, 1987
    Date of Patent: March 20, 1990
    Assignee: Solvay & Cie (societe Anonyme)
    Inventors: Marc Lemaire, Jean Roncali, Robert Garreau, Francis Garnier, Etienne Hannecart
  • Compositions based on vinylidene fluoride polymers which have a reduced smoke-generating capacity
    Patent number: 4898906
    Abstract: Compositions based on vinylidene fluoride polymers which have a reduced smoke-generating capacity, comprising an effective amount of a molybdenum derivative, such as the molybdate of calcium, zinc or aluminium, as a smoke reducer.The compositions are very particularly suitable for the manufacture of shaped articles used in building and in aeronautics.
    Type: Grant
    Filed: August 28, 1987
    Date of Patent: February 6, 1990
    Assignee: Solvay & Cie
    Inventor: Etienne Hannecart