Patent · US Active

Exhaust gas-purifying catalyst

US8133837B2 · kind B2 · utility

2Cited by

34References

17Claims

0Family size

Assignee

CATALER CORPORATION · JP

Inventors

Yuji Yabuzaki · Shizuoka, JP
Akimasa Hirai · Kakegawa, JP
Kenichi Taki · Nomi, JP

Key dates

Filing date	Mar 11, 2009
Grant date	Mar 13, 2012
Priority date	—
Expiry date	Mar 11, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Decreasing HC emission is made possible. An exhaust gas-purifying catalyst includes a substrate, a hydrocarbon-adsorbing layer covering the substrate, and a catalytic layer covering the hydrocarbon-adsorbing layer. The catalytic layer includes a layered structure of a first catalytic layer including a precious metal and a carrier supporting it, and a second catalytic layer including the same precious metal as the precious metal of the first catalytic layer and a carrier supporting it and having a concentration of the precious metal higher than that in the first catalytic layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.