Aqueous-based air treating systems
US4248380A · kind A · utility
12Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1977 |
| Grant date | Feb 3, 1981 |
| Priority date | — |
| Expiry date | Dec 27, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L9/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for the controlled release of air treating material comprising a hydrophilic membrane secured to a reservoir containing an active ingredient in aqueous medium, the membrane serving as the means for releasing the active ingredient to the atmosphere and for controlling the rate of release.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.