Patents by Inventor Klaus-Ingo Prieger

Klaus-Ingo Prieger 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 desulfating a nitrogen oxide storage catalyst
    Patent number: 6973775
    Abstract: The invention relates to a method for desulfating a nitrogen oxide storage catalyst that contains stored nitrogen oxides and sulfur oxides and that forms part of an exhaust gas purification system of a lean-burn engine. The method provides that, to initiate desulfation, the temperature of the catalyst is increased to the point where thermal desorption of the nitrogen oxides stored in the catalyst sets in, and the onset of thermal desorption of the nitrogen oxides is used as the signal to enrich the air/fuel mixture to perform the desulfation.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: December 13, 2005
    Assignee: Umicore AG & Co. KG
    Inventors: Michael Hoffmann, Harald Klein, Klaus-Ingo Prieger, Thomas Kreuzer
  • Method for desulfating a nitrogen oxide storage catalyst
    Publication number: 20040112042
    Abstract: The invention relates to a method for desulfating a nitrogen oxide storage catalyst that contains stored nitrogen oxides and sulfur oxides and that forms part of an exhaust gas purification system of a lean-burn engine. The method provides that, to initiate desulfation, the temperature of the catalyst is increased to the point where thermal desorption of the nitrogen oxides stored in the catalyst sets in, and the onset of thermal desorption of the nitrogen oxides is used as the signal to enrich the air/fuel mixture to perform the desulfation.
    Type: Application
    Filed: August 8, 2003
    Publication date: June 17, 2004
    Applicant: OMG AG & CO. KG
    Inventors: Michael Hoffmann, Harald Klein, Klaus-Ingo Prieger, Thomas Kreuzer