Patents by Inventor Frédéric Barbette

Frédéric Barbette 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).

  • Method and installation for removal of metal cations from a liquid by resins with polyazacycloalkanes grafted on a support
    Patent number: 7083732
    Abstract: The invention is related to a method and an installation for removal of metal cations contained in a liquid, in which said liquid is brought into contact at a temperature greater than or equal to 60° C. with a chelating ion exchange resin formed from a polyazacycloalkane grafted on a solid support, said resin having been conditioned, previously to said contacting, at a pH of 4 to 6.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: August 1, 2006
    Assignees: Commissariat a l'Energie Atomique, Centre National de la Recherche Scientifique
    Inventors: Hervé Chollet, Jean-Louis Babou, Frédéric Barbette, Roger Guilard
  • Method for preparing polyazacycloalkanes grafted on silica gel and use of grafted compounds
    Patent number: 6372903
    Abstract: The invention concerns a method for preparing polyazacycloalkanes immobilised on a silica gel from a polyazacycloalkane of formula (A) in which: R1 and R2 represent a hydrogen atom, an alkyl radical, or a [hetero(aryl)]alkyl radical; W1, W2 and W3 represent a radical of formula (B): —[(CT1T2)n—[N(R3)]p—(CT3T4)m]l— such as defined in the description; R3 represents a hydrogen atom, an alkyl radical or a [hetero(aryl)]alkyl radical, provided that the polyazacycloalkane ring of the compound of formula (A) comprises not more than 30 cyclic carbon atoms, and not more than 6 cyclic nitrogen atoms.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: April 16, 2002
    Assignees: Commissariat a l'Energie Atomique, L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Ahmad Mehdi, Franck Denat, Frédéric Barbette, Roger Guilard, Gilles Lagrange