Air filter with passivated filter life indicator
US11213780B2 · kind B2 · utility
0Cited by
30References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2016 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Oct 16, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2275/203
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air filter including a visually uniform filter life indicator (30), the air filter (1) comprising: a conformable, unframed air filter media (10) that is installable on at least a portion of an upstream face (11) of a filter-support layer of an air-handling system, wherein the conformable, unframed air filter media comprises at least one passivated area (20) that provides a visually uniform filter life indicator of the air filter. Filter life indicators are used in order that aspects of the filtration performance of an air filter can be monitored.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.