Patents by Inventor Gilles Waton

Gilles Waton 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).

  • Process for the extraction of cations and application thereof to the treatment of aqueous effluents
    Patent number: 4876036
    Abstract: A process for the extraction of cations from an aqueous effluent. An effective quantity of at least one polymer or copolymer, which is physically or chemically crosslinked, is introduced into the aqueous effluent. The polymer or copolymer is based on one or more units selected from salified acrylic acid, quarternized acrylic acid, and a copolymer comprising from 40 to 60 mole % of acrylic acid and from 60 to 40 mole % of at least one dialkylaminoalkyl acrylate in which each alkyl group contains from 1 to 4 carbon atoms. This process is used to treat aqueous effluents.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: October 24, 1989
    Assignee: Societe Chimique des Charbonnages S.A.
    Inventors: Sauveur Candau, Maurice Leroy, Jean-Pierre Brunette, Paul Mallo, Jean-Francois Loret, Gilles Waton