Patents by Inventor Danan Dou

Danan Dou 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).

  • NO2 abatement composition with enhanced sulfur resistance
    Patent number: 6468484
    Abstract: A NOx adsorber composition comprising a substrate; and a washcoat, wherein said washcoat comprises a catalytic metal component, a trapping material, and a porous support, wherein said porous support comprises cerium oxide and an oxygenated metal selected from the group consisting of lanthanum oxide, yttrium oxide, neodymium oxide, and combinations comprising at least one of the foregoing oxygenated metals.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: October 22, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Danan Dou, Owen H. Bailey
  • Methods to reduce alkali material migration from NOx adsorber washcoat to cordierite
    Publication number: 20020082164
    Abstract: An exhaust gas catalyst system, comprising: a substrate; and a nitrogen oxides adsorber deposited on said substrate, the nitrogen oxides adsorber comprising: a porous support; and a material loaded on said porous support comprising: a NO oxidation catalyst, at least one alkali material, and at least one alkali metal barrier.
    Type: Application
    Filed: January 11, 2001
    Publication date: June 27, 2002
    Inventors: Danan Dou, Owen H. Bailey
  • Dual NOx adsorber catalyst system
    Patent number: 6391822
    Abstract: A NOx adsorber catalyst system for treatment of gases in an exhaust discharge passage of an internal combustion engine comprising: a first adsorber catalyst supporting effective amounts of at least one noble metal component and a Ba component; and, a second adsorber catalyst supporting effective amounts of at least one noble metal catalyst, a Ba component, and a K component.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: May 21, 2002
    Assignee: Delphi Technologies, Inc.
    Inventors: Danan Dou, Owen H. Bailey
  • Sulfur trap in NOx adsorber systems for enhanced sulfur resistance
    Publication number: 20010035006
    Abstract: An exhaust gas catalyst system, comprises: a sulfur trap warm-up catalyst, housed within the exhaust stream and comprising: a sulfur scavenger component; and a NOX adsorber catalyst, housed within the exhaust stream downstream from said sulfur trap in an underfloor position. The method of reducing sulfur poisoning of a nitrogen oxide adsorber, housed within an exhaust gas catalyst system, comprises: placing a sulfur trap within the exhaust stream upstream from a NOX adsorber, wherein said sulfur trap comprises: a sulfur scavenger component.
    Type: Application
    Filed: December 27, 2000
    Publication date: November 1, 2001
    Inventors: Danan Dou, Michel Molinier, Owen Bailey