Method of making a NOx adsorber catalyst
US7375056B2 · kind B2 · utility
4Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2003 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Nov 15, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A treatment element and an exhaust emission control device for the treatment of gases in an exhaust passage of an internal combustion engine and methods of making thereof are described. In the method, at least two different catalyst compositions are applied along the major axis length of a single substrate to form a treatment element having at least two different zones of catalyst composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.