Patents by Inventor Wolfram Kaiser

Wolfram Kaiser 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).

  • BIOPOLAR PLATE, IN PARTICULAR FOR A FUEL CELL
    Publication number: 20080124610
    Abstract: The invention relates to a bipolar plate (1) for a fuel cell stack, comprising two disc parts (2.1, 2.2) which are joined to one another on the inside in a functionally tolerant manner with respect to the capability for fluid and/or gas to pass through, forming internal cavities.
    Type: Application
    Filed: November 19, 2007
    Publication date: May 29, 2008
    Inventors: Wolfram Kaiser, Markus Watzlawski, Jan Martin Kreye
  • Device For Carrying Out A Chemical Reaction
    Publication number: 20070287047
    Abstract: The invention relates to a device for carrying out a chemical reaction, particularly for producing electrical energy. The inventive device comprises at least one first flow channel for a first reaction medium, at least a second flow channel for a second reaction medium that is different from the first reaction medium, at least a third flow channel for a first temperature-adjusting medium and at least a fourth flow channel for a second temperature-adjusting medium that is different from the first temperature-adjusting medium.
    Type: Application
    Filed: November 16, 2005
    Publication date: December 13, 2007
    Applicant: BEHR GMBH & CO. KG
    Inventors: Wolfram Kaiser, Conrad Pfender
  • Metal bipolar plate
    Patent number: 6989213
    Abstract: The invention relates to a metal bipolar plate for a fuel cell, provided with a low-ohmic chemically stable coating. According to the invention, said coating is a multi-phase coating, at least in the region of the contacting outer surface thereof. One phase is a metal phase and/or ? phase belonging thereto and another phase is a compound phase consisting of one or several metals of the metal phase and one of the elements N,O,C,B.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: January 24, 2006
    Assignee: Ballard Power Systems Inc.
    Inventors: Wolfram Kaiser, Detlev Repenning, Richard Spaeh, Joerg Wind
  • High-temperature fuel cell
    Patent number: 6797423
    Abstract: In a high-temperature fuel cell, the problem exists that a series electrical resistance rises while the high-temperature fuel cell is operating. This rise is caused by oxidation of the fuel-gas-side surface of the bipolar plate. Oxidation of this nature is largely suppressed by an oxidation buffer that is disposed in the fuel gas chamber and takes up the oxygen.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: September 28, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Robert Fleck, Wolfram Kaiser
  • Metal bipolar plate
    Publication number: 20040038108
    Abstract: The invention relates to a metal bipolar plate for a fuel cell, provided with a low-ohmic chemically stable coating. According to the invention, said coating is a multi-phase coating, at least in the region of the contacting outer surface thereof. One phase is a metal phase and/or &agr; phase belonging thereto and another phase is a compound phase consisting of one or several metals of the metal phase and one of the elements N,O,C,B.
    Type: Application
    Filed: November 13, 2002
    Publication date: February 26, 2004
    Inventors: Wolfram Kaiser, Detlev Repenning, Richard Spaeh, Joerg Wind
  • High-temperature fuel cell
    Patent number: 6620541
    Abstract: During operation of a high-temperature fuel cell the problem of corrosion of the interconnector on the anode side arises. Accordingly, this problem is substantially prevented by use of at least two metallic functional layers that are applied one above the other on the interconnector. A lower functional layer contains copper and an upper functional layer contains nickel. Functional layers of this type construct a potential threshold for oxygen ions toward the interconnector.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: September 16, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Robert Fleck, Wolfram Kaiser
  • High-temperature fuel cell
    Publication number: 20020094465
    Abstract: During operation of a high-temperature fuel cell the problem of corrosion of the interconnector on the anode side arises. Accordingly, this problem is substantially prevented by use of at least two metallic functional layers that are applied one above the other on the interconnector. A lower functional layer contains copper and an upper functional layer contains nickel. Functional layers of this type construct a potential threshold for oxygen ions toward the interconnector.
    Type: Application
    Filed: September 26, 2001
    Publication date: July 18, 2002
    Inventors: Robert Fleck, Wolfram Kaiser
  • High-temperature fuel cell
    Publication number: 20020045083
    Abstract: In a high-temperature fuel cell, the problem exists that a series electrical resistance rises while the high-temperature fuel cell is operating. This rise is caused by oxidation of the fuel-gas-side surface of the bipolar plate. Oxidation of this nature is largely suppressed by an oxidation buffer that is disposed in the fuel gas chamber and takes up the oxygen.
    Type: Application
    Filed: September 26, 2001
    Publication date: April 18, 2002
    Inventors: Robert Fleck, Wolfram Kaiser