Patents by Inventor Mark T. Paffett

Mark T. Paffett 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).

  • Catalysts for lean burn engine exhaust abatement
    Patent number: 7083765
    Abstract: The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200° C. to about 400° C.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: August 1, 2006
    Assignee: The Regents of the University of California
    Inventors: Kevin C. Ott, Noline C. Clark, Mark T. Paffett
  • Catalysts for lean burn engine exhaust abatement
    Publication number: 20040258595
    Abstract: The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200° C. to about 400° C.
    Type: Application
    Filed: April 6, 2004
    Publication date: December 23, 2004
    Inventors: Kevin C. Ott, Noline C. Clark, Mark T. Paffett
  • Catalysts for lean burn engine exhaust abatement
    Patent number: 6716783
    Abstract: The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200° C. to about 400° C.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: April 6, 2004
    Assignee: The Regents of the University of California
    Inventors: Kevin C. Ott, Noline C. Clark, Mark T. Paffett
  • Catalysts for lean burn engine exhaust abatement
    Publication number: 20030165415
    Abstract: The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200° C. to about 400° C.
    Type: Application
    Filed: December 17, 2002
    Publication date: September 4, 2003
    Inventors: Kevin C. Ott, Noline C. Clark, Mark T. Paffett
  • Catalysts for lean burn engine exhaust abatement
    Patent number: 6514470
    Abstract: The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200° C. to about 400° C.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: February 4, 2003
    Assignee: The Regents of the University of California
    Inventors: Kevin C. Ott, Noline C. Clark, Mark T. Paffett