Patents by Inventor Robert Pipon

Robert Pipon 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).

  • 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
  • Aluminium salts of betaine chloride and compositions containing the same
    Patent number: 4058597
    Abstract: Aluminum salts of the formula: ##STR1## WHEREIN A IS AN INTEGER FROM 1 THROUGH 4, B IS AN INTEGER FROM 1 THROUGH 5 AND C IS AN INTEGER FROM 1 THROUGH 13, THE NUMBERS REPRESENTED BY THE INDICES A, B AND C BEING CONNECTED BY THE RELATIONSHIPS 3B = A + C AND THE RATIO B/A IS EQUAL TO OR GREATER THAN 1 AND LESS THAN OR EQUAL TO 2.5, ARE NEW COMPOUNDS POSSESSING PHARMACOLOGICAL, ANTI-PERSPIRANT AND DEODORANT PROPERTIES.
    Type: Grant
    Filed: March 9, 1976
    Date of Patent: November 15, 1977
    Assignee: Rhone-Poulenc Industries
    Inventors: Andre Henri Passedouet, Robert Pipon
  • Certain quaternary ammonium salts used to control gram-negative bacteria
    Patent number: 4015013
    Abstract: Quaternary ammonium salts of the formula: ##STR1## in which R is alkyl of 7 to 16 carbon atoms and X.sup.- is a monovalent anion, have interesting germicidal properties, especially against Gram-negative bacteria.
    Type: Grant
    Filed: June 10, 1975
    Date of Patent: March 29, 1977
    Assignee: Rhone-Poulenc S.A.
    Inventors: Andre Henri Passedouet, Robert Pipon
  • Aluminium and/or magnesium salts of amino-acids
    Patent number: 4013699
    Abstract: New salts of the formula: ##EQU1## WHEREIN N REPRESENTS 3 OR 4, A REPRESENTS AN INTEGER FROM 1 THROUGH 10, B REPRESENTS ZERO OR AN INTEGER FROM 1 THROUGH 9, C REPRESENTS ZERO OR 1, AT LEAST ONE OF THE INDICES B AND C REPRESENTING AN INTEGER, AND D REPRESENTS ZERO OR AN INTEGER FROM 1 THROUGH 19, THE NUMBERS REPRESENTED BY THE INDICES A, B, C AND D BEING CONNECTED BY THE RELATIONSHIP A + D = 3 B + 2 C, POSSESS PHARMACOLOGICAL PROPERTIES, AND ARE PARTICULARLY USEFUL AS ANTI-ULCER AGENTS AND AS AGENTS FOR PROTECTING THE GASTRO-INTESTINAL MUCOUS MEMBRANE.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: March 22, 1977
    Assignee: Rhone-Poulenc S.A.
    Inventors: Andre Henri Passedouet, Robert Pipon