Patents by Inventor Jean Naveau

Jean Naveau 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 the preparation of block copolymers
    Patent number: 6417272
    Abstract: A process is disclosed for manufacturing coupled radial block copolymers of the S—B—Li type having improved optical properties, which process utilizes coupling agents having from about 3 to about 7 epoxy groups per mole.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: July 9, 2002
    Assignee: Fina Research, S.A.
    Inventors: Emmanuel Lanza, Jean Naveau
  • Process for decolorizing vinyl aromatic conjugated diene copolymers
    Patent number: 6184341
    Abstract: A process for eliminating color from vinyl aromatic/conjugated diene copolymers which process comprises treating the copolymers with a monocarboxylic acid having general formula R—COOH, where R is a hydrocarbon radical comprising 2 to 4 carbon atoms and R further comprises linear or branched aliphatic radicals, cycloaliphatic radicals, alkenic radicals, aromatic radicals or alkylaromatic radicals.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: February 6, 2001
    Assignee: Fina Research, S.A.
    Inventors: Emmanuel Lanza, Jean Naveau
  • Process for the preparation of block copolymers
    Patent number: 6153695
    Abstract: A process is disclosed for manufacturing coupled radial block copolymers of the S-B-Li type having improved optical properties, which process utilizes coupling agents having from about 3 to about 7 epoxy groups per mole.
    Type: Grant
    Filed: April 7, 1999
    Date of Patent: November 28, 2000
    Assignee: Fina Research, S.A.
    Inventors: Emmanuel Lanza, Jean Naveau
  • Vinyl aromatic/conjugated diene block copolymers deactivated to alkali metal-alcoholate termination and treated with cyclic anhydride
    Patent number: 6150463
    Abstract: The present invention related to a process for the treatment of vinyl aromatic/conjugated diene block copolymers. More particularly, the present invention relates to a process for the treatment of such copolymers obtained starting from a (co)polymerization-initiating stage performed by means of alkaline based catalysts (Me), deactivated in such a way that they show a termination of the alkali metal-alcoholate type (--O--Me), and treated with a cyclic anhydride of polycarboxylic acid, and optically a C.sub.2 -C.sub.4 monocarboxylic acid.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: November 21, 2000
    Assignee: Fina Research, S.A.
    Inventors: Emmanuel Lanza, Jean Naveau
  • Process for the decoloration of resinous polymers of the vinyl aromatic/conjugated diene type
    Patent number: 6048961
    Abstract: A process for eliminating color from vinyl aromatic/conjugated diene copolymers which process comprises treating the copolymers with a monocarboxylic acid having the general formula R--COOH, where R is a hydrocarbon radical comprising 2 to 4 carbon atoms and R further comprises linear or branched aliphatic radicals, cycloaliphatic radicals, alkenic radicals, aromatic radicals or alkylaromatic radicals.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: April 11, 2000
    Assignee: Fina Research, S.A.
    Inventors: Emmanuel Lanza, Jean Naveau
  • Process for removing the solvent from a polymer solution
    Patent number: 5478509
    Abstract: The present invention relates to a continuous process for recovering polymer particles from a solution of polymer by evaporating the solvent from the solution by successively treating the solution into a first agitated vessel and treating the resulting polymer into a second agitated vessel. Furthermore, the invention relates to an apparatus for performing the aforesaid process for recovering polymer particles.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: December 26, 1995
    Assignee: Fina Research, S.A.
    Inventors: William R. King, Fred R. Feder, Jean Naveau, Jean M. Mlinaric
  • Process for the preparation of block copolymers
    Patent number: 5264489
    Abstract: Coupling of block base copolymers terminated by a lithium atom of the typical formula S-B-Li, in which S is a monovinylaromatic hydrocarbon block and B is a conjugated diene block, by the use of at least one difunctional deactivating coupling agent and at least one polyfunctional deactivating coupling agent in a molar ratio such that the linear polymer obtained by coupling represents 65 to 95% by weight of the total polymer material obtained by coupling.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: November 23, 1993
    Assignee: Fina Research, S.A.
    Inventors: Emmanuel Lanza, Jean Naveau, Michel Daumerie