Patents by Inventor Catherine Helen de Rouffignac

Catherine Helen de Rouffignac 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).

  • Membrane electrode assembly having an adhesive layer impregnating through an electrocatalyst layer and into a first gas diffusion substrate
    Patent number: 9083012
    Abstract: A membrane electrode assembly comprises an ion-conducting membrane; a first electrocatalyst layer having a surface facing the membrane; a first electronically-conducting porous gas diffusion substrate facing the other surface of the first electrocatalyst layer; and a first film member interposed between the membrane and the first electrocatalyst layer. The first electrocatalyst layer has an edge region and a central region, and the first film member contacts the edge region and not the central region. A first adhesive layer is present on the surface of the first film member facing the first electrocatalyst layer, and the first adhesive layer adheres the first film member to the first electrocatalyst layer, impregnates through the first electrocatalyst layer, and impregnates into the first gas diffusion substrate.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: July 14, 2015
    Assignees: JOHNSON MATTHEY FUEL CELLS LIMITED, GENERAL MOTORS CORPORATION
    Inventors: Catherine Helen de Rouffignac, Hubert Gasteiger, Adam John Hodgkinson, Peter Anthony Trew, Bhaskar Sompalli, Susan Yan, Brian Litteer
  • Sealing of a membrane electrode assembly
    Patent number: 8551668
    Abstract: A sealed and/or reinforced membrane electrode assembly is disclosed. Encapsulation films, each comprising a backing layer and an adhesive layer, are positioned on the edges of at least one face of each gas diffusion substrate such that the adhesive layers impregnate into each gas diffusion substrate. Methods of forming sealed and/or reinforced membrane electrode assemblies are also disclosed.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: October 8, 2013
    Assignee: Johnson Matthey Fuel Cells Limited
    Inventors: Silvain Buche, Adam John Hodgkinson, Catherine Helen de Rouffignac, Jonathan David Brereton Sharman
  • SEALING OF A MEMBRANE ELECTRODE ASSEMBLY
    Publication number: 20130040228
    Abstract: A sealed and/or reinforced membrane electrode assembly is disclosed. Encapsulation films, each comprising a backing layer and an adhesive layer, are positioned on the edges of at least one face of each gas diffusion substrate such that the adhesive layers impregnate into each gas diffusion substrate. Methods of forming sealed and/or reinforced membrane electrode assemblies are also disclosed.
    Type: Application
    Filed: October 17, 2012
    Publication date: February 14, 2013
    Applicant: Johnson Matthey Public Limited Company
    Inventors: Silvain Buche, Adam John Hodgkinson, Catherine Helen de Rouffignac, Jonathan David Brereton Sharman
  • Sealing of a membrane electrode assembly
    Patent number: 8309268
    Abstract: A sealed and/or reinforced membrane electrode assembly is disclosed. Encapsulation films, each comprising a backing layer and an adhesive layer, are positioned on the edges of at least one face of each gas diffusion substrate such that the adhesive layers impregnate into each gas diffusion substrate. Methods of forming sealed and/or reinforced membrane electrode assemblies are also disclosed.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: November 13, 2012
    Assignee: Johnson Matthey Fuel Cells Limited
    Inventors: Silvain Buche, Adam John Hodgkinson, Catherine Helen de Rouffignac, Jonathan David Brereton Sharman