Method of making a respirator that has a fluorinated electret
US6953544B2 · kind B2 · utility
17Cited by
64References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 2004 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Aug 23, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/696
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of making a respirator, which method includes placing an electret in a respirator body that is adapted to fit over the nose and mouth of a wearer. The electret is disposed in the respirator body such that air passes through it before being inhaled by a respirator wearer. The electret includes a nonwoven web that has fluorinated polymeric microfibers and that has at least about 25% atomic fluorine as detected by ESCA and a CF3:CF2 ratio of at least about 0.45.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.