Patents by Inventor Catherine Bonnet

Catherine Bonnet 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).

  • Agent for pre-treatment of rough mineral materials for pigmentary applications
    Patent number: 4842651
    Abstract: A pre-treatment of rough pigmentary mineral materials to eliminate the viscosifying effect of the swelling clays present in said materials used to condition said materials before refining them in an aqueous medium by abrasion or grinding. The method enables the production of refined pigmentary suspensions with a concentration of at least 75% by weight and low viscosity and stable over time. The pre-treatment agent is comprised of acid polymers and/or copolymers containing at least one carboxylate ethylenic monomer. Suspensions with high concentration of pigmentary mineral materials are prepared from the conditioned materials.
    Type: Grant
    Filed: January 28, 1988
    Date of Patent: June 27, 1989
    Assignee: Coatex S.A.
    Inventors: Georges Ravet, Catherine Bonnet, Jacques Mongoin