Patents by Inventor Hervé Chollet

Hervé Chollet 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).

  • Material comprising polyazacycloalkanes, grafted on polypropylene fibres, its process of preparation, and process for removing metal cations from a liquid
    Patent number: 8841384
    Abstract: Material composed of a polyazacycloalkane grafted on polypropylene fibres. Process for the preparation of this material. Process for removing metal cations present in a liquid by bringing this liquid into contact with the said material.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: September 23, 2014
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Frédéric Rascalou, Franck Denat, Roger Guilard, Jean-Louis Babouhot, Hervé Chollet, Michel Meyer
  • Achromatic and absorption reducing light collecting system, particularly adapted to optical spectrometric analysis
    Patent number: 7492454
    Abstract: This system collects light emitted by at least one light source (52) and focuses it onto at least one light detection device (54). Preferably, it comprises a first mirror (58) that collects light emitted by the source and focuses it on a second mirror (60) that focuses it in turn onto the device. The system is provided with a chamber that is opaque to all light, particularly ultraviolet radiation, and in which the light source, the light detection device and the mirrors are placed, and means of creating a vacuum in this chamber and filling it with a gas that is transparent to ultraviolet radiation.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: February 17, 2009
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-Charles Hubinois, Vincent Lavoine, Hervé Chollet
  • 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
  • POLYAZACYCLOALKANES, TRI-, TETRA- OR PENTA-AZAMACROCYCLIC COMPLEXES, PROCESSES FOR THE PRODUCTION OF THESE SUBSTITUTED OR UNSUBSTITUTED POLYAZACYCLOALKANES GRAFTED TO A SUPPORT AND USES OF POLYAZACYCLOALKANES AND THE AFOREMENTIONED COMPLEXES
    Patent number: 6410143
    Abstract: The invention relates to polyazacycloalkanes having 3, 4 or 5 nitrogen atoms, tri-, tetra- or penta-azamacrocyclic transition metal complexes and processes for the production of said polyazacycloalkanes. The object of the invention is to form polyazacycloalkanes able to trap metal cations and in particular U, Pu, Am, Ce, Eu, Al, Gd, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Sn, Au, Mg or Pb or complexes able to trap in particular oxygen in a gaseous mixture. The invention more particularly applies to the treatment of liquid effluents from nuclear power stations.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: June 25, 2002
    Assignee: Commissariat a l'Energie Atomique and Air
    Inventors: Roger Guilard, Hervé Chollet, Philippe Guiberteau, Panayotis Cocolios
  • Polyazacycloalkanes, tri, tetra- or penta-azamacrocyclic complexes, processes for the production of these substituted or unsubstituted polyazacycloalkanes grafted to a support and uses of polyazacycloalkanes and the aforementioned complexes
    Patent number: 6265483
    Abstract: The invention relates to polyazacycloalkanes having 3, 4 or 5 nitrogen atoms, tri-, tetra- or penta-azamacrocyclic transition metal complexes and processes for the production of said polyazacycloalkanes. The object of the invention is to form polyazacycloalkanes able to trap metal cations and in particular U, Pu, Am, Ce, Eu, Al, Gd, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Sn, Au, Mg or Pb or complexes able to trap in particular oxygen in a gaseous mixture. The invention more particularly applies to the treatment of liquid effluents from nuclear power stations.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: July 24, 2001
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Roger Guilard, Hervé Chollet, Philippe Guiberteau, Panayotis Cocolios