Fire-retardant filter medium and air filter unit
US6336948B1 · kind B1 · utility
22Cited by
64References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1999 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | May 27, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2327/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter medium with excellent flame-resistant properties and an air filter unit using the same are provided which have a flame-resistant air permeable supporting material on at least one surface of a polytetrafluoroethylene (PTFE) porous film and which can be used as a ceiling device, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.