Patents by Inventor Evelyne Chassagneux

Evelyne Chassagneux 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).

  • Polymorphic B form of 3-(cyclopropylmethoxy)-4-[4-(methylsulfonyl)phenyl]-5,5-dimethyl-5H-furan-2-one
    Patent number: 6677373
    Abstract: This invention is related to a polymorphic B Form of 3-(cyclopropylmethoxy)-4-[4-(methylsulfonyl)phenyl]-5,5-dimethyl-5H-furan-2-one characterized by the following parameters: cristalline system Trigonal space group R-3 description hexagonal unit-cell dimensions a (Å) 18.183 b (Å) 18.183 c (Å) 26.950 &agr; (°) 90 &bgr; (°) 90 &ggr; (°) 120 unit-cell volume (Å3) 7716.5 number of molecules per unit-cell Z 18 Temperature of measurement (° K) 293 calculated specific gravity 1.303 weight absorption coefficient (cm−1) 2.11.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: January 13, 2004
    Assignee: Merial Limited
    Inventors: Beatrice Calais, Evelyne Chassagneux, Jean-Michel Bonard
  • Polymorphic B Form of 3-(cyclopropylmethoxy)-4-[4(methylsulfonyl)phenyl]-5,5- dimethyl-5H-furan-2-one
    Publication number: 20030050337
    Abstract: This invention is related to a polymorphic B Form of 3-(cyclopropylmethoxy)-4-[4-(methylsulfonyl)phenyl]-5,5-dimethyl-5H-furan-2-one characterized by the following parameters: 1 cristalline system Trigonal space group R-3 description hexagonal unit-cell dimensions a (Å) 18.183 b (Å) 18.183 c (Å) 26.950 &agr; (°) 90 &bgr; (°) 90 &ggr; (°) 120 unit-cell volume (Å3) 7716.5 number of molecules per unit-cell Z 18 Temperature of measurement (° K) 293 calculated specific gravity 1.303 weight absorption coefficient (cm−1) 2.
    Type: Application
    Filed: April 8, 2002
    Publication date: March 13, 2003
    Inventors: Beatrice Calais, Evelyne Chassagneux, Jean-Michel Bonard
  • Triethynylborazines and production of BN ceramics therefrom
    Patent number: 5316986
    Abstract: Novel boron/nitrogen compounds having the formula (1): ##STR1## and the products of the at least partial reduction thereof, are converted into BN ceramic materials by thermally polymerizing same, whether or not in the presence of suitable polymerization catalyst, and then pyrolyzing the boron/nitrogen polymers thus obtained.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: May 31, 1994
    Assignee: Rhone-Poulenc Chimie
    Inventors: Christiane Blanchard, Evelyne Chassagneux, Gerard Mignani, Michel Vaultier
  • Ceramic fibers having improved surface properties/rupture strength
    Patent number: 5043045
    Abstract: Ceramic fibers based on silicon carbide, silicon nitride or silicon carbonitride are treated with hydrofluoric acid, e.g., with a 3% to 30% aqueous solution of HF, to strip surface impurities therefrom, to reduce critical surface defects and to enhance the rupture strength thereof.
    Type: Grant
    Filed: May 10, 1989
    Date of Patent: August 27, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventors: Evelyne Chassagneux, Olivier Caix