Ceramic honeycomb filter and its production method
US8092568B2 · kind B2 · utility
10Cited by
0References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2007 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jan 15, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/349
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A ceramic honeycomb filter comprising a honeycomb structure having large numbers of flow paths partitioned by porous cell walls, and plugs alternately formed in the flow paths on the exhaust-gas-inlet and outlet sides, the outlet-side plugs having porosity of 65% or less, and the upstream-side end surfaces of the outlet-side plugs having surface roughness Ra of 13-50 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.