Patents by Inventor Isidore Le Fur

Isidore Le Fur 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 converting [R(-)-2(3-benzoylphenyl)-propionic acid to the S(+) isomer]
    Patent number: 5426215
    Abstract: Process for transforming (benzoyl-3-phenyl)-2-propionic-R(-) acid into an S(+) isomer through the action of a base either in situ during the splitting of racemic ketoprofen or on the crystallization mother liquor of a (benzoyl-3-phenyl)-2-propionic-S(+) acid salt.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: June 20, 1995
    Assignee: Rhone-Poulenc Rorer, S.A.
    Inventors: Claude Bertrand, Elie Fouque, Isidore Le Fur, Jean-Paul Richard
  • Process for preparing ascorbic acid
    Patent number: 5391770
    Abstract: Process for preparing pure ascorbic acid from 2-keto-L-gulonic acid or its sodium salt, by carrying out the following successive steps:esterification of 2-keto-L-gulonic acid or its sodium saltlactonization to sodium ascorbateoptional separation of the sodium ascorbatedisplacement of the ascorbic acid from its saltseparation of the sodium sulphateseparation and purification of the ascorbic acid from its methanolic or aqueous-methanolic solution.
    Type: Grant
    Filed: December 23, 1993
    Date of Patent: February 21, 1995
    Assignee: Rhone Poulenc Rorer S.A.
    Inventors: Isidore Le Fur, Jean-Paul Richard, Gerard Wolff
  • Process for the preparation of aromatic ethers
    Patent number: 5013855
    Abstract: A process for the preparation of an aromatic ether of general formula: ##STR1## by the action of 3-chloro-1,2-propanediol sulfate on a phenol of general formula:Ar--OHin the presence of an inorganic base.Use of a product obtained according to the process for the preparation of adrenergic .beta.-blockers.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: May 7, 1991
    Assignee: Rhone-Poulenc Sante
    Inventors: Bernard Botannet, Isidore Le Fur, Viviane Massonneau, Michel Mulhauser
  • Process for separating 2-keto-L-gulonic acid from a fermented medium
    Patent number: 4990441
    Abstract: 2-Keto-L-gulonic acid is separated from a fermented medium containing the calcium salt of 2-keto-L-gulonic acid, by carrying out the following operations: separation of insolubles; removal of inorganic cations; and separation of the 2-keto-L-gulonic acid.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: February 5, 1991
    Assignee: Rhone-Poulenc Sante
    Inventors: Jean-Pierre Barthole, Jean Filippi, Aurelia Jaeger-Seddik, Isidore Le Fur, Jean-Yves Pommier