Composition for skin healing comprising a chitosan hydrogel
CA 2476131 A1 · Owner: Europlak · Inventors: Domard, Alain; Guillot, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The composition for healing and formation of scar tissue on skin lesions of chronic or acute wounds, comprises exclusively a hydrogel of chitosan the , degree of acetylation of which is greater than 40 % and preferably comprises 2 to 6 %. The embodiment may be a dressing either in the form of a sheet with a reduced thickness of 1 to 10mm, optionally associated with a support sheet for example made from cellulose, or in the form of particles of reduced size or furthermore, in the form of a paste comprising ground material. For the latter case the chitosan hydrogel is prepared by milling in water and partially removing the water to give a paste.
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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 February 13, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 13, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 13, 2025.
- 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.