Molded respirator containing sorbent particles
US6234171A · kind A · utility
25Cited by
53References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 2000 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | May 11, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B23/025
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Molded respirators containing an air-permeable, sorbent-particle-containing layer between air-permeable particle-retaining layers. The particle-containing layer is stretchable during shaping without tearing or significant loss of particles. At least some of the fibers in the particle-containing layer are sufficiently tacky after being formed by themselves into a particle-free web and cooled to room temperature so that the web will adhere to itself. The respirators can be molded from flat webs without the need to fabricate the particle-containing layer into a shaped preform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.