Patents by Inventor César Lopes

César Lopes 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).

  • Hybrid organic-inorganic material constituted by a silica network having photochromic agents and optical power limiting agents as a doping agent in the material
    Patent number: 8901185
    Abstract: The invention concerns a preparation process of a hybrid organic-inorganic material including the following successive steps: a) preparation of a neutral organosilicon sol in at least one organic solvent, b) incorporation of a doping agent into the neutral organosiliconsol, and production of a doped sol, c) incorporation into the doped sol, of an accelerating agent in order to activate the subsequent gelation of the sol, d) condensation of the sol in order to obtain a crosslinked gel, e) drying of the gel and production of a stable doped gel. and the material obtainable by such a method.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 2, 2014
    Assignees: Universite Claude Bernard Lyon I, Centre National de la Recherche Scientifique, FOI Swedish Defence Research Agency
    Inventors: Frédéric Chaput, Stéphane Parola, César Lopes, Denis Chateau, Cédric Desroches
  • METHOD FOR PREPARING HYBRID MATERIALS OBTAINED BY FAST CONDENSATION OF AN ORGANOSILICON SOL
    Publication number: 20130131203
    Abstract: The invention concerns a preparation process of a hybrid organic-inorganic material including the following successive steps: a) preparation of a neutral organosilicon sol in at least one organic solvent, b) incorporation of a doping agent into the neutral organosiliconsol, and production of a doped sol, c) incorporation into the doped sol, of an accelerating agent in order to activate the subsequent gelation of the sol, d) condensation of the sol in order to obtain a crosslinked gel, e) drying of the gel and production of a stable doped gel. and the material obtainable by such a method.
    Type: Application
    Filed: April 12, 2011
    Publication date: May 23, 2013
    Applicants: Centre National De La Recherche Scientifique, Universite Claude Bernard I
    Inventors: Frédéric Chaput, Stéphane Parola, César Lopes, Denis Chateau, Cédric Desroches