Patents by Inventor Ulrike Kramm

Ulrike Kramm 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 preparing fuel cell electrode catalyst and solid polymer fuel cell
    Patent number: 8455384
    Abstract: According to the present invention, the catalyst performance of a chelate catalyst comprising a complex of a macrocyclic compound such as a porphyrin derivative is improved. Also, the following method is provided: a method for preparing a fuel cell electrode catalyst comprising a nitrogen-containing metal complex in which a metallic element is coordinated with a macrocyclic organic compound, such method comprising the steps of: adding tin oxalate to the nitrogen-containing metal complex; and baking a mixture of the nitrogen-containing metal complex and tin oxalate in an inert gas atmosphere, wherein elution of metal tin is carried out via acid treatment.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: June 4, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, Helmholtz-Zentrum Berlin Fuer Materialien und Energie GmbH
    Inventors: Naoko Iwata, Hiroaki Takahashi, Peter Bogdanoff, Sebastian Fiechter, Iris Herrmann-Geppert, Ulrike Kramm
  • METHOD FOR PREPARING FUEL CELL ELECTRODE CATALYST AND SOLID POLYMER FUEL CELL
    Publication number: 20110130270
    Abstract: According to the present invention, the catalyst performance of a chelate catalyst comprising a complex of a macrocyclic compound such as a porphyrin derivative is improved. Also, the following method is provided: a method for preparing a fuel cell electrode catalyst comprising a nitrogen-containing metal complex in which a metallic element is coordinated with a macrocyclic organic compound, such method comprising the steps of: adding tin oxalate to the nitrogen-containing metal complex; and baking a mixture of the nitrogen-containing metal complex and tin oxalate in an inert gas atmosphere, wherein elution of metal tin is carried out via acid treatment.
    Type: Application
    Filed: July 29, 2008
    Publication date: June 2, 2011
    Inventors: Naoko Iwata, Hiroaki Takahashi, Peter Bogdanoff, Sebastian Fiechter, Iris Herrmann-Geppert, Ulrike Kramm