Process for the manufacture of multi-layered wound dressings
CA 2469809 A1 · Owner: Avery Dennison Corporation · Inventors: De Jong, Johannes H. A.; Lipman, Roger D. A.; Nijns, Dirk I. H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuous process for manufacturing a multilayered wound dressing (10) including an apetured wound contact layer (13) an absorbent material layer , (12), and a backing layer (11). The process includes providing a substantially continuous first web (19) including layer (13) and a first process lelease liner (15),forming a plurality of apetures (14) through layer (13) applying , layer (12) to layer (13), laminating a sbstantially continuous web of layer (11) over layer (12) to form a composite web and cutting individual , multilayered dressing (10) from the composite web.
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 December 21, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2023.
- 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.