Patents by Inventor Christian G. Guizard

Christian G. Guizard 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 for treating an aqueous solution containing ionic species to be extracted selectively
    Patent number: 6210584
    Abstract: A method for selectively extracted species from an aqueous solution which comprises contacting the aqueous solution with a membrane capable of selectively transporting species from a liquid to another, the membrane comprising a porous polymer support having an average surface pore size less than 100 nm, coated with a continuous layer of a fluorinated polymer obtained by plasma energized chemical vapor deposition (PECVD) using a plasma containing at least one fluorinated compound.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: April 3, 2001
    Assignee: Eastman Kodak Company
    Inventors: Didier J. Martin, Christian G. Guizard, Jean H. Durand, Hélène C. Lecacheux
  • Method for regenerating seasoned aqueous fixing or bleach/fixing solutions
    Patent number: 5958245
    Abstract: The invention concerns a method and a device for the selective extraction of the halide ions from photographic baths. According to the invention, the solutions to be treated are subjected to a first nanofiltration step 2 in diafiltration mode, then to a second nanofiltration step 3 in concentration mode. The method makes it possible to prolong the activity of the fixing or bleaching/fixing baths during the processing of photographic products.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: September 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: Didier J. Martin, Christian G. Guizard, Jean-Francois Diaz
  • Method for the preparation of metallic oxide coatings
    Patent number: 5112676
    Abstract: The invention relates to a method for the preparation of metallic oxides. The method is carried by controlled hydrolysis of metallic alkoxides using an alkoxide emulsion which contains hydrophobic water/solvent reverse micelles and a surfactant, then submitting the polymer gel obtained to thermal treatment. In order to prepare metallic oxides layers, the reaction product is coated on a support when hydrolysis is only partial.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: May 12, 1992
    Assignee: Centre National de la Recherche Scientifique 'CNRS
    Inventors: Louis Cot, Jacques C. Rouviere, Christian G. Guizard, Andre Larbot
  • Process for producing a macromolecular compound having a functional group at each end of the molecule
    Patent number: 4125692
    Abstract: Di or polyfunctional macromolecular compounds having a terminal functional group at each end of the molecule are produced by selectively cleaving the carbon-carbon double bonds of an unsaturated polymer by the oxidizing action of a ruthenium tetroxide oxidizing system. The compounds are useful as components in crosslinked plastics materials, in binders for rocket fuels, and as components in tri or polysequential copolymers.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: November 14, 1978
    Assignee: Etat Francais represented by the "Delegue General pour l'Armement"
    Inventors: Herve M. Cheradame, Jacques H. Garapon, Christian G. Guizard, Maryvonne Brigodiot