Patents by Inventor Paul Aviron Violet

Paul Aviron Violet 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).

  • Patent number: 4943679
    Abstract: A process for the N-.omega.-trifluoroacetylation of a saturated aliphatic monocarboxylic .alpha.,.omega.-diamino acid. A saturated aliphatic monocarboxylic .alpha.,.omega.-diamino acid of the formula: ##STR1## wherein R represents a straight-chain or branched-chain C.sub.1 -C.sub.6 alkylene radical, is contacted with a C.sub.1 -C.sub.6 straight-chain or branched-chain alkyl trifluoroacetate.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: July 24, 1990
    Assignee: Rhone-Poulenc Chimie
    Inventors: Paul Aviron-Violet, Christian Gervals
  • Patent number: 4237072
    Abstract: Neral or geranial are hydrogenated into optically active citronellal in the presence of a catalytic complex comprising a rhodium derivative and a chiral phosphine.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: December 2, 1980
    Assignee: Rhone-Poulenc Industries
    Inventors: Paul Aviron-Violet, Tuan-Phat Dang
  • Patent number: 4010181
    Abstract: Optically active diphosphines of the formula, ##STR1## in which the phosphinomethyl groups are trans to each other, form rhodium complexes useful as catalysts in hydrogenating substituted acrylic acids and their esters to optically active propionic acid derivatives.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: March 1, 1977
    Assignee: Rhone-Poulenc S.A.
    Inventor: Paul Aviron-Violet
  • Patent number: 3978101
    Abstract: Optically active diphosphines of the formula: ##EQU1## in which the phosphinomethyl groups are trans to each other, from rhodium complexes useful as catalysts in hydrogenating substituted acrylic acids and their esters to optically active propionic acid derivatives.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: August 31, 1976
    Assignee: Rhone-Poulenc S.A.
    Inventor: Paul Aviron-Violet
  • Patent number: 3949000
    Abstract: Optically active diphosphines of the formula: ##EQU1## in which the phosphinomethyl groups are trans to each other, form rhodium complexes useful as catalysts in hydrogenating substituted acrylic acids and their esters to optically active propionic acid derivatives.
    Type: Grant
    Filed: May 17, 1974
    Date of Patent: April 6, 1976
    Assignee: Rhone-Poulenc S.A.
    Inventor: Paul Aviron Violet