Filter media
US6334881B1 · kind B1 · utility
47Cited by
28References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2000 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Apr 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2323/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is an improved material which may be used as a filter media for gas filtration systems, such as for industrial gas streams and commercial or residential vacuum cleaners. The filter material comprises a filter media support bonded to a porous expanded PTFE membrane, and further comprising a screen material bonded to the porous expanded PTFE. The screen material protects the expanded PTFE surface against damage due to impingement of particles during operation of the gas filtration system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.