Patents by Inventor Patrick Cros

Patrick Cros 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).

  • Production of heteroplysaccharide biopolymers with xanthomonas in oil-in-water emulsion
    Patent number: 5756317
    Abstract: Heteropolysaccharide biopolymers well adopted as thickening agents are improvedly produced by microbially fermenting a carbohydrate nutrient medium, said nutrient medium comprising an oil-in-water emulsion of a discontinuous oily phase dispersed within a continuous aqueous phase.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: May 26, 1998
    Assignee: Rhone-Poulenc Specialities Chimiques
    Inventors: Veronique Leproux, Michel Peignier, Patrick Cros, Jeanine Beucherie, Yves Kennel
  • Production of polysaccharides of high viscosity using xanthomonas campestris and glycoamylase with fluidized starch
    Patent number: 5610037
    Abstract: Polysaccharide biopolymers, e.g., xanthan gum, are produced by the aerobic microbial fermentation of a carbohydrate in an aqueous nutrient medium containing starch as a source of carbon, and wherein the fermentation is carried out in the presence of a saccharide-specific amylolytic enzyme.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: March 11, 1997
    Assignee: Rhone-Poulenc Chimie
    Inventor: Patrick Cros
  • Microbiological production of itaconic acid
    Patent number: 5231016
    Abstract: Itaconic acid is produced economically, with high productivity, by microbiologically fermenting an aqueous nutritive medium containing at least one starch as a source of assimilable carbon, in the presence of at least one saccharifying amylolytic enzyme.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: July 27, 1993
    Assignee: Rhone-Poulenc Chimie
    Inventors: Patrick Cros, Didier Schneider
  • Acid/heat modified polysaccharide biopolymers
    Patent number: 5010186
    Abstract: Novel deacetylated polysaccharide biopolymers having improved viscosity/filtrability/injectability, well adopted for the secondary and tertiary recovery of oil deposits, are conveniently prepared by (i) acidifying an aqueous polysaccharide composition, e.g., a carbohydrate fermentation broth, with nitric acid to a pH of from about 2 to 0.1, (ii) heat-treating said acidified composition at a temperature of from about 50.degree. to 100.degree. C. for from about 5 to 60 minutes, and (iii) cooling said heat-treated composition and adjusting the pH thereof to a value of from about 5 to 7.
    Type: Grant
    Filed: September 13, 1989
    Date of Patent: April 23, 1991
    Assignee: Rhone-Poulenc Specialties Chimiques
    Inventors: Patrick Cros, Robert Pipon
  • Acid/heat modified polysaccharide biopolymers
    Patent number: 4873323
    Abstract: Novel deacetylated polysaccharide biopolymers having improved viscosity/filtrability/injectability, well adopted for the secondary and tertiary recovery of oil deposits, are conveniently prepared by (i) acidifying an aqueous polysaccharide composition, e.g., a carbohydrate fermentation broth, with nitric acid to a pH of from about 2 to 0.1, (ii) heat-treating said acidified composition at a temperature of from about 50.degree. to 100.degree. C. for from about 5 to 60 minutes, and (iii) cooling said heat-treated composition and adjusting the pH thereof to a value of from about 5 to 7.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: October 10, 1989
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventors: Patrick Cros, Robert Pipon