Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Reexamination Certificate
2007-08-09
2009-11-24
Vanoy, Timothy C (Department: 1793)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
C423S213500, C423S213700, C423S239100, C423S245300, C423S247000, C502S527120, C502S527130, C422S168000, C422S169000, C422S170000, C422S171000, C422S177000, C422S180000, C422S181000, C060S274000, C060S282000, C060S299000, C060S302000
Reexamination Certificate
active
07622096
ABSTRACT:
A layered three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides is disclosed. Engine exhaust treatment system and methods of using the same are also provided. In one or more embodiments, the catalyst supported on a carrier has three layers, where at least two of the layers are zoned to have an oxygen storage component being present in an upstream zone in an amount that is less than the oxygen storage component present in the downstream zone.
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PCT Search Report, Mailing Date Nov. 20, 2008.
Deeba Michel
Rabinowitz Harold
Slemund Stephan
Svoboda Glenn
Wassermann Knut
BASF Catalysts LLC
Brown Melanie L.
Diehl Servilla LLC
Vanoy Timothy C
Whitney Karen M.
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