Patents by Inventor Michel Dedieu

Michel Dedieu 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 deodorizing a mercapto acid by extracting malodorous compound therefrom with a supercritical fluid
    Patent number: 5344971
    Abstract: A process for deodorizing a mercapto acid includes extracting malodorous compounds present therein by treating the mercapto acid in the presence of a polar solvent with a supercritical extraction fluid having a critical temperature ranging from 0.degree. to 135.degree. C. and a critical pressure ranging from 10.sup.6 to 10.sup.7 Pascals. The mercapto acid has the formula HS--A--COOH wherein A represents ##STR1## wherein n is an integer ranging from 1 to 4 and R is a linear or branched C.sub.1 -C.sub.3 alkyl.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: September 6, 1994
    Assignee: L'Oreal
    Inventors: Michel Dedieu, Herve Burgaud, Eric Lapoirie, Veronique Gurfein, Gerard Malle
  • Process for deodorising a mercapto acid by extracting malodorous compounds therefrom with carbon dioxide
    Patent number: 5329045
    Abstract: A process for deodorizing a mercapto acid or a polar solvent solution thereof includes extracting malodorous compounds present therein by extraction with carbon dioxide in gaseous, liquid or solid form. The mercapto acid has the formula HS-A-COOH wherein A represents ##STR1## wherein n is an integer ranging from 1-4 and R is linear or branched C.sub.1 -C.sub.3 alkyl.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: July 12, 1994
    Assignee: L'Oreal
    Inventors: Michel Dedieu, Herve Burgaud, Eric LaPoirie, Veronique Gurfein, Gerard Malle