Exhaust gas purification catalyst device
US11524285B2 · kind B2 · utility
1Cited by
17References
9Claims
0Family size
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Key dates
| Filing date | Jan 25, 2019 |
| Grant date | Dec 13, 2022 |
| Priority date | — |
| Expiry date | Apr 24, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the upstream end in the exhaust gas flow to 50% of the upper layer length, and a range b from the upper layer top surface to 18 μm in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.