Ostomy pouch and high performance deodorizing gas filter assembly therefor
US7559922B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2007 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Dec 3, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F5/441
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ostomy pouch and high-performance gas filter assembly therefor, in which the filter assembly includes an envelope defining a filter chamber containing a radial flow deodorizing filter pad. The pad's opposite faces are joined to the inner surfaces of the envelope in such a way that the periphery of the pad is fully exposed within the chamber. A first passage extends through the filter and communicates with a first opening in a wall of the envelope over which a first microporous membrane extends. A second opening extends through the opposite wall of the envelope at a distance spaced laterally from the first opening, and a second hydrophobic microporous membrane extends over the second opening. In a preferred embodiment, the filter pad is oblong in shape and has a second passage spaced laterally from the first passage and communicating with the second aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.