Cleanable HEPA filter media
US6409785B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Aug 7, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1362
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pleatable and cleanable filter media (22) that has a HEPA filtration rating. The filter media (22) includes a porous primary filtration layer (22). The primary filtration layer tending to be less than HEPA rated upon being damaged. A first substrate layer (64) attached to said primary filtration layer (62) for maintaining the shape of the filter media (22). The first substrate layer (64) includes a non-woven filtration media and being less than HEPA rated. A second substrate layer (82) attached to the first substrate layer (64) functioning as a secondary filter in the event of damage to the primary filtration layer (62). The second substrate layer (82) includes a non-woven filtration media and being less than HEPA rated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.