Patents by Inventor Claude Casse

Claude Casse 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 hydroxy 4-methyl thiobutyric acid esters
    Patent number: 6660880
    Abstract: A process, for the preparation of an ester of 2-hydroxy-4-methylthiobutyric acid which is substantially in the monomeric form, which process, being capable of industrial application and which comprises reacting 2-hydroxy-4-methylthiobutyric acid with an alcohol in the presence of water and an acid catalyst at a temperature of from 30 to 150° C. wherein the acid is the direct product of the hydrolysis of 2-hydroxy-4-methylthiobutyronitrile.
    Type: Grant
    Filed: February 7, 2001
    Date of Patent: December 9, 2003
    Assignee: Adisseo Ireland Limited
    Inventors: Michel Garrait, Claude Casse, George Gros
  • Process for the preparation of hydroxy methylthiobutyric acid esters
    Patent number: 6479695
    Abstract: A process for the preparation of 2-hydroxy-4-methylthiobutyric acid ester which comprises (a) a first step of reacting 2-hydroxy-4-methylthiobutyronitrile with sulphuric acid to produce 2-hydroxy-4-methylthiobutyramide, and (b) a second step of reacting the 2-hydroxy-4-methylthiobutyramide with an alcohol to produce a 2-hydroxy-4-methylthiobutyric acid ester, the two steps being carried out in the same reaction medium.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: November 12, 2002
    Assignee: Aventis Animal Nutrition, S.A.
    Inventors: Michel Garrait, Claude Casse, Georges Gros
  • Process for the preparation of hydroxy 4-methyl thiobutyric acid esters
    Publication number: 20010029308
    Abstract: A process, for the preparation of an ester of 2-hydroxy-4-methylthiobutyric acid which is substantially in the monomeric form, which process, being capable of industrial application and which comprises reacting 2-hydroxy-4-methylthiobutyric acid with an alcohol in the presence of water and an acid catalyst at a temperature of from 30 to 150° C. wherein the acid is the direct product of the hydrolysis of 2-hydroxy-4-methylthiobutyronitrile.
    Type: Application
    Filed: February 7, 2001
    Publication date: October 11, 2001
    Inventors: Michel Garrait, Claude Casse, Georges Gros
  • Process for the condensation of an aldehyde with hydrogen cyanide
    Patent number: 5756803
    Abstract: A process for the condensation of an aldehyde with hydrogen cyanide in the presence of a buffer is disclosed. The buffer advantageously allows the condensation reaction to occur at a pH equal to or above 4.0 and in the absence of amines.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: May 26, 1998
    Assignee: Rhone-Poulenc Nutrition Animale
    Inventors: Claude Casse, Frederic Kress, Philippe Morel