Patents by Inventor Dieter Birkhorst

Dieter Birkhorst 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).

  • Amine oxide coating compositions
    Publication number: 20040171734
    Abstract: An aqueous coating composition is provided comprising carbon particles, one or more highly fluorinated polymers and one or more amine oxide surfactants, typically an amine oxide surfactant according to formula I: 1
    Type: Application
    Filed: March 8, 2004
    Publication date: September 2, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Armin Steurer, Dieter Birkhorst, James Michael Larson, Joseph William Frisk, Wayne Meredith Boand
  • Amine oxide coating compositions
    Patent number: 6703068
    Abstract: An aqueous coating composition is provided comprising carbon particles, one or more highly fluorinated polymers and one or more amine oxide surfactants, typically an amine oxide surfactant according to formula I: where n is 9 to 19. The coating composition is advantageously used in a method of making a gas diffusion layer for an electrochemical cell comprising the steps of: a) coating a electrically conductive porous substrate with the aqueous coating composition, and b) heating the electrically conductive porous substrate to a temperature sufficient to decompose the amine oxide surfactants. In another aspect, a gas diffusion layer for an electrochemical cell is provided which is advantageously free of surfactant.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: March 9, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Armin Steurer, Dieter Birkhorst, James Michael Larson, Joseph William Frisk, Wayne Meredith Boand
  • Amine oxide coating compositions
    Publication number: 20030114576
    Abstract: An aqueous coating composition is provided comprising carbon particles, one or more highly fluorinated polymers and one or more amine oxide surfactants, typically an amine oxide surfactant according to formula I: 1
    Type: Application
    Filed: December 19, 2001
    Publication date: June 19, 2003
    Inventors: Klaus Hintzer, Armin Steurer, Dieter Birkhorst, James Michael Larson, Joseph William Frisk, Wayne Meredith Boand