Patents by Inventor Jean Paul Richard

Jean Paul Richard 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
  • Stabilized, foamed water gel explosives and method
    Patent number: 4026738
    Abstract: A foamed or aerated water gel explosive composition devoid of any self-explosive sensitizer is provided which is sensitive to detonation in charge diameters greater than 5.1 cm. The explosive composition retains sensitivity for long periods. The migration or collapse of air or gas entrained in the composition is substantially prevented by incorporating a blend of a foaming surfactant and a stabilizing surfactant in chosen proportions.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: May 31, 1977
    Assignee: Canadian Industries, Ltd.
    Inventor: Jean Paul Richard
  • Stabilized air bubble-containing explosive compositions
    Patent number: 3995673
    Abstract: A foamed or aerated explosive composition containing a water-soluble organic nitrate sensitizer is provided which retains sensitivity for long periods in small diameter cartridges. The dissipation or migration of entrained air or gas in the composition is substantially prevented by incorporating a blend of a foaming surfactant and a stabilizing surfactant in chosen proportions.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: December 7, 1976
    Assignee: Canadian Industries, Ltd.
    Inventors: Benedict John Grigaitis, Harold William Holden, Terrence Charles Matts, Maurice Henry Miskow, Jean Paul Richard, Philip Faut Lit Seto