Patents by Inventor Karl Heinz Härdtl

Karl Heinz Härdtl 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).

  • Oxygen sensitive resistance material
    Patent number: 6319429
    Abstract: Oxygen sensitive resistance materials for use with oxygen sensors, in particular &lgr; probes are described. These materials are based on the fact that with complex metal oxides it is possible—by adding suitable doping substances—to achieve a negligible temperature dependence of the electric resistance of these materials for different oxygen partial pressures and to preset it to a desired partial pressure value.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: November 20, 2001
    Assignee: DaimlerChrysler AG
    Inventors: Ralf Moos, Wolfgang Menesklou, Hans-Jürgen Schreiner, Karl Heinz Härdtl