Wound dressing
CA 2521984 C · Owner: Shaw, Helen Louise · Inventors: Linnane, Patrick Gerard; Shaw, Helen Louise
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wound dressing for post-operative sites requiring drainage comprising a , thin film or film/foam laminate layer with an adhesive applied to one surface thereof; an absorbent layer positioned on the adhesive surface of the thin film layer, the dressing being provided with an aperture to accommodate a drainage tube; and the dressing being slit from the aperture to an outer edge of the dressing.
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
- Filed April 7, 2004 and granted March 6, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2026.
- 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.