Exhaust gas-purifying catalyst
US8039418B2 · kind B2 · utility
8Cited by
5References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 11, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Dec 11, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2570/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A high exhaust gas-purifying performance is achieved. An exhaust gas-purifying catalyst includes a substrate, a lower layer covering the substrate and including an oxygen storage material and palladium, and an upper layer covering the lower layer and including rhodium and a carrier supporting it. The lower layer is rhodium-free. The upper layer has an oxygen storage capacity lower than that of the lower layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.