Broad spectrum filter system including tungsten-based impregnant and being useful for filtering contaminants from air or other gases
US7309513B2 · kind B2 · utility
10Cited by
26References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2005 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Mar 10, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Filter systems that are effective against a broad range of contaminants including HCN, cyanogen chloride (CK), acid contaminants. and basic contaminants such as ammonia without the need (but with the option, if desired) for using molybdenum or chromium containing materials. The filtering systems of the present invention include a tungsten-based material and other impregnants incorporated into a substrate such as filter media particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.