Wound dressing material
US4625720A · kind A · utility
Inventor
Key dates
| Filing date | Jan 20, 1984 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Jan 20, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/530802
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A wound dressing material comprising a sheet of a synthetic plastics material which is permeable to water vapour and to air, having on one side a surface for application to a wound, and immediately behind the said surface a cellular region having a structure of collapsed, open cells which intercommunicate with one another, and a more dense region behind the cellular region, and an intermediate region in which there is a gradual transition from the cellular region to the more dense region, so that on contact with liquid exudate from a wound, the dressing material will absorb a limited amount of exudate into the cellular region but prevent it from passing right through the dressing material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.