Patents by Inventor Stephanie Roualdes

Stephanie Roualdes 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).

  • Copolymers comprising phosphonate and/or phosphonic acid groups, usable for forming fuel cell membranes
    Patent number: 9138691
    Abstract: Copolymers comprising at least one recurrent unit of the following formula (I) are provided: and at least one recurrent unit of the following formula (II): wherein: R1 is an alkylene group; Z is a —PO3R3R4, R3 and R4 representing independently of each other, a hydrogen atom an alkyl group, a cation; X and Y represent, independently of each other, a halogen atom, a perfluorocarbon group.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: September 22, 2015
    Assignees: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Russell Tayouo, Ghislain David, Bruno Ameduri, Stéphanie Roualdes, Hervé Galiano, Jannick Bigarre
  • COPOLYMERS COMPRISING PHOSPHONATE AND/OR PHOSPHONIC ACID GROUPS, USABLE FOR FORMING FUEL CELL MEMBRANES
    Publication number: 20120219878
    Abstract: Copolymers comprising at least one recurrent unit of the following formula (I) are provided: and at least one recurrent unit of the following formula (II): wherein: R1 is an alkylene group; Z is a —PO3R3R4, R3 and R4 representing independently of each other, a hydrogen atom an alkyl group, a cation; X and Y represent, independently of each other, a halogen atom, a perfluorocarbon group.
    Type: Application
    Filed: October 19, 2010
    Publication date: August 30, 2012
    Applicant: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Russell Tayouo, Ghislain David, Bruno Ameduri, Stéphanie Roualdes, Hervé Galiano, Jannick Bigarre
  • Electrode for alkali fuel cell and method for making a fuel cell including at least one step of making such an electrode
    Patent number: 8017283
    Abstract: An electrode for an alkali fuel cell comprises an active layer formed by a bilayer or by a stack of a plurality of bilayers. Each bilayer is composed of a catalytic layer comprising catalyst particles of nanometric size and of a porous layer comprising two opposite faces one of which is in contact with the catalytic layer. The porous layer is made from a porous composite material comprising a hydroxide ion conducting polymer matrix in which a metallic lattice is formed constituting a plurality of electronically conducting paths connecting the two opposite faces of the porous layer. Advantageously, fabrication of such an electrode is obtained by successively performing vacuum deposition of the catalyst particles and vacuum co-deposition of the hydroxide ion conducting polymer and of the metal on a free surface of a support.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: September 13, 2011
    Assignees: Commissariat a l'Energie Atomique, Universite Montpellier II, Centre National de la Recherche Scientifique
    Inventors: Audrey Martinent, Jean-Yves Laurent, Max Perrin, Mauricio Schieda, Jean Durand, Stephanie Roualdes
  • Electrode for Alkali Fuel Cell and Method for Making a Fuel Cell Including at Least One Step of Making Such an Electrode
    Publication number: 20090042092
    Abstract: An electrode for an alkali fuel cell comprises an active layer formed by a bilayer or by a stack of a plurality of bilayers. Each bilayer is composed of a catalytic layer comprising catalyst particles of nanometric size and of a porous layer comprising two opposite faces one of which is in contact with the catalytic layer. The porous layer is made from a porous composite material comprising a hydroxide ion conducting polymer matrix in which a metallic lattice is formed constituting a plurality of electronically conducting paths connecting the two opposite faces of the porous layer. Advantageously, fabrication of such an electrode is obtained by successively performing vacuum deposition of the catalyst particles and vacuum co-deposition of the hydroxide ion conducting polymer and of the metal on a free surface of a support.
    Type: Application
    Filed: October 18, 2006
    Publication date: February 12, 2009
    Applicants: COMMISSARIAT A L'ENERGIE ATOMIQUE, UNIVERSITE MONTPELLIER II, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Audrey Martinent, Jean-Yves Laurent, Max Perrin, Mauricio Schieda, Jean Durand, Stephanie Roualdes