Catalytic wall flow filter
US12305553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2024 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Feb 5, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalytic wall-flow filter for exhaust gas from a gasoline engine is disclosed. The catalytic wall-flow filter comprises a wall-flow filter substrate having porous walls and a first face and a second face defining a longitudinal direction therebetween and first and second pluralities of channels extending in the longitudinal direction. The first plurality of channels is open at the first face and closed at the second face, and the second plurality of channels is open at the second face and closed at the first face. The filter comprises a first TWC coating comprising a first PGM composition, a first oxygen storage capacity (OSC) material, and a first inorganic support; and a second TWC coating comprising a second PGM composition, a second OSC material, and a second inorganic support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.