Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2007-11-20
2007-11-20
Nguyen, Cam N. (Department: 1754)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S302000, C502S303000, C502S304000, C502S349000, C502S339000, C502S327000, C502S328000, C502S330000, C502S333000, C502S334000, C502S439000
Reexamination Certificate
active
11517852
ABSTRACT:
An exhaust gas-purifying catalyst includes a carrier, and an active component formed of a noble metal, carried by the carrier. The carrier has a core portion comprising a cubic or tetragonal stabilized zirconia-based composite oxide containing at least one stabilizing element, and a surface layer portion including a heat resistant zirconia-based composite oxide formed on a surface of the core portion. The surface layer has a specific surface area which is larger than a specific surface area of the core portion. A part of the noble metal is solid-solutioned into the zirconia-based composite oxide of the surface layer portion, and the balance of the noble metal is carried on a surface of the surface layer portion.
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Kimura Mareo
Miyoshi Naoto
Tan Isao
Tanaka Hirohisa
Cataler Corporation
Daihatsu Motor Co. Ltd.
Morrison & Foerster / LLP
Nguyen Cam N.
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