Filter media for long-term high temperature applications
US9446337B2 · kind B2 · utility
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10References
22Claims
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Key dates
| Filing date | Sep 26, 2012 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Jan 17, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1216
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter media is generally described including an upstream layer of a nonwoven fiber having a denier between about 5.0 and 7.0 and a weight of between about 3.0 and 5.0 opsy, optionally a scrim, and a cap layer of a fiber having a denier between about 0.1 and 5.0, and a weight between about 2.0 and 4.0 opsy carried by the upstream layer and disposed downstream from the upstream layer. The upstream layer, scrim and cap layer can have a weight of about 4.0 opsy, 2.0 opsy and 3.0 opsy respectively. A downstream layer can be disposed between the upstream layer and the cap layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.