Air filter with visual filter life indicator zone and sorbent-loaded visual reference zone
US11027231B2 · kind B2 · utility
2Cited by
17References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2016 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Jun 29, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air filter (1) comprises an air filter media (10) with a sorbent-free area (20) that provides a visual filter life indicator zone (30) and with a sorbent-loaded area (26) that provides a visual reference zone (27).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.