Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2011-01-11
2011-01-11
Nguyen, Cam N (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S328000, C502S330000, C502S332000, C502S334000, C502S339000, C502S349000, C502S350000, C502S351000, C502S355000, C502S415000, C502S439000, C502S527130, C502S304000
Reexamination Certificate
active
07867943
ABSTRACT:
An exhaust gas purifying catalyst which is made excellent in heat resistance and in S-resistance by keeping the catalytic activity of Pt particles in a satisfactory state. The exhaust gas purifying catalyst is made such that a coating layer containing a compound oxide of cerium and an oxide of a metal for stabilizing the oxide of said cerium and an oxide containing no cerium is formed on a substrate, and such that platinum particles are carried on the catalyst. Said compound oxide has a pore volume of 0.1 cc/g or more, and said platinum particles are selectively adsorbed at the electron accepting points on said compound oxide.
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Nguyen Cam N
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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