Chemical filter medium, chemical filter including the chemical filter medium and method for manufacturing the chemical filter
US7163573B2 · kind B2 · utility
2Cited by
5References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2004 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Nov 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A chemical filter medium for removing ozone and nitrogen oxide includes a first ozone absorption layer for mainly removing ozone having a filtering base material for removing ozone, a first nitrogen oxide absorption layer for mainly removing nitrogen oxide formed on the first ozone absorption layer that includes a filtering base material for removing nitrogen oxide, and a second ozone absorption layer formed on the first nitrogen oxide absorption layer that includes a filtering base material for removing ozone. The chemical filter medium can simultaneously remove ozone and nitrogen oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.