Patents by Inventor Robert Zerrouk

Robert Zerrouk 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).

  • Weed control
    Patent number: 6924252
    Abstract: The invention provides a method for controlling the growth of weeds at a locus in a solid growing medium which comprises treating the locus with a composition comprising an isoxazole herbicide to provide progressive or sequential delivery or release of isoxazole herbicide into the surface layer of the medium.
    Type: Grant
    Filed: January 2, 2000
    Date of Patent: August 2, 2005
    Assignee: Aventis Agriculture Limited
    Inventors: David Alan Roberts, Robert Zerrouk, Rachel Colegate
  • Active-substance vector multiparticulate system, production and use thereof
    Patent number: 6916481
    Abstract: The invention relates to an active substance vector multiparticulate system and to the production and use thereof. The object of the invention is an active-substance vector multiparticulate system comprising one or several active substances included in a hydrophilic organic matrix comprising at least one hydrosoluble and/or hydrodispersable anionic polymer which is insolubilized by a metallic cation. The invention can be specifically used in the food industry, detergents and agrochemistry.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: July 12, 2005
    Assignees: Aventis CropScience
    Inventors: Christian Prud'Homme, Etienne Fleury, Jean-Paul Michalon, Robert Zerrouk
  • Weakly acidic colloidal dispersions of cerium (IV) compounds
    Patent number: 5132048
    Abstract: Weakly acidic colloidal aqueous dispersions of particulates of a cerium (IV) compound, having a pH ranging from 1.5 to 5, well adapted for catalyst applications, are prepared by (a) acidulating a cerium (IV) hydroxide with an acid having a pKa ranging from 2.5 to 5.0, or with a salt or mixture thereof, (b) next separating the resulting cerium (IV) compound that precipitates from the medium of acidulation, and then (c) colloidally dispersing such cerium (IV) precipitate in an aqueous medium.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: July 21, 1992
    Assignee: Rhone-Poulenc Chimie
    Inventors: Francoise Picard-Seon, Robert Zerrouk