Wound dressing
CA 1296512 C · Owner: Smith And Nephew Associated Companies P.L.C. · Inventors: Webster, David Fitzgerald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Wound Dressing, An absorbent non-adherent wound dressing-suitable, for use in deep and cavernous wounds is described. The dressing comprises an absorbent material in the form of individual pieces of a conformable, resilient absorbent, hydrophilic foam retained within a porous bag formed from a perforated polymeric film. In a preferred form the foam is a hydrophilic polyurethane foam and the perforated polymeric film is a contoured net of a thermoplastic elastomeric polymer. A non-woven fabric may be additionally present between the perforated polymeric film and the pieces of foam. The dressings can absorb large volumes of wound exudate without adhering to the wound.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.