End of service life indicator for a respirator
US10213629B2 · kind B2 · utility
8Cited by
20References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 2013 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Aug 18, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B9/006
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Systems, methods, and devices for an end of service life indicator for a respirator are described herein. For example, a device can include a cartridge containing a filter material and an insert extending through at least a portion of the filter material having a first path with a first opening to provide a sample of air that is representative of a saturation of the filter material and a second path with a second opening configured to provide a filtered sample of the air throughout a service life of the cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.