Patents by Inventor Maurice Coudurier

Maurice Coudurier 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: 6013234
    Abstract: Dry, freely-flowing, water-insoluble but readily dispersible, solid and homogeneous silica pigment particulates essentially spheroidal in geometrical configuration and having a mean particle size in excess of, preferably in excess of, are prepared by atomizing to dryness a pulverulent aqueous suspension of silica having a solids contact in excess of 18%. Such silica pigment particulates, advantageously comprised of precipitated silica, are well adapted as reinforcing fillers for elastomeric matrices.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 11, 2000
    Assignee: Rhodia Chimie
    Inventors: Jean-Louis Ray, Maurice Coudurier
  • Patent number: 4243428
    Abstract: Process for the manufacturing of silicas having a specific surface area ranging between 100 and 600 sq m/g, which does not vary upon drying, due to the action of a strong acid on an alkaline silicate, characterized by the fact that the addition of strong acid to the alkaline silicate is interrupted one to three times.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: January 6, 1981
    Inventors: Jean-Baptise Donnet, Bernard Baudru, Maurice Coudurier, Georges Vrisakis
  • Patent number: 4068035
    Abstract: A hydrophilic polyurethane composition comprising a reaction product of:1. 10 to 45 weight percent of an organic diisocyanate and,2. 35 to 89 weight percent of a compound containing one or two active hydrogen atoms selected from:A. 75 to 100 weight percent of a compound of the general formula:R--(O--C.sub.x H.sub.x).sub.n -OHwhereinR is hydrogen or a hydrocarbon radical containing from 1 to 20 carbon atoms;X is a number from 2 to 4;n is a number to indicate that the molecular weight is between 300 and 10,000; and,B. 0 to 25 weight percent of a diol and,3. 1 to 25 weight percent of a nitrogen-containing compound of the general formula: ##STR1## wherein R' is an alkyl radical containing from 1 to 5 carbon atoms;X.sub.1 and X.sub.2 are hydroxyalkyl or amino alkyl radicals with the proviso that the overall ratio of NCO/active H is from about 0.7 to about 1.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: January 10, 1978
    Assignee: Rhone-Poulenc Industries
    Inventors: Robert Violland, Alain Lagasse, Bernard Papillon, Jean Neel, Maurice Coudurier