Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Reexamination Certificate
2005-05-24
2005-05-24
Nguyen, Cam N. (Department: 1754)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
C502S066000, C502S074000, C502S087000, C502S302000, C502S303000, C502S304000, C502S327000, C502S328000, C502S330000, C502S333000, C502S334000, C502S339000, C502S340000, C502S344000, C502S349000, C502S355000, C502S415000, C502S439000, C502S527120, C502S527130
Reexamination Certificate
active
06896857
ABSTRACT:
An exhaust gas purifying catalyst comprises a powder including a porous material having a specific surface area of 150 m2/g or more, cerium and platinum. Cerium and Platinum are loaded on the porous material. The powder has platinum dispersion of 70% or more before baking and platinum dispersion of 50% or more after baking in air at 700° C. Additionally, a reduction rate R of the platinum dispersion after the baking against the platinum dispersion before the baking is below 40%. The reduction rate R is represented by a following equation (1):in-line-formulae description="In-line Formulae" end="lead"?R=(1−(Pt dispersion after baking)/(Pt dispersion before baking))×100 (1).in-line-formulae description="In-line Formulae" end="tail"?
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Nakamura Masanori
Suga Katsuo
Foley & Lardner LLP
Nguyen Cam N.
Nissan Motor Co,. Ltd.
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