Patents by Inventor John B. Oelfke

John B. Oelfke 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).

  • Nitrogen oxide adsorbing material
    Patent number: 5795553
    Abstract: A material effective for adsorbing NO.sub.x from an exhaust stream of a combustion process, such as from an internal combustion engine operating under lean burn conditions, is disclosed. The material comprises an alkali metal-doped and copper-doped hydrous metal oxide material that has been calcined. The alkali metal is selected from potassium and sodium. The material is coated onto a substrate, such as ceramic beads or pellets, or a honeycomb cordierite monolith, and placed in contact with the exhaust stream.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: August 18, 1998
    Assignee: Low Emmissions Technologies Research and Development Partnership
    Inventors: Stephen E. Lott, Timothy J. Gardner, Linda I. McLaughlin, John B. Oelfke, Charlene A. Matlock