N-acetylated chitosan membranes
CA 2355437 A1 · Owner: Pal, Rajinder · Inventors: Huang, Robert Y.M.; Pal, Rajinder; Moon, Go Young
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite membrane is provided comprising a porous substrate membrane coated with, a membrane comprising N-acetylated chitosan. The N-acetylated chitosan is characterized by a degree of N-acetylation greater than 50% and less than 90%. The, porous substrate membrane includes any of polyvinylidene fluoride polysulfone, and a, ceramic. In this respect composite membrane is provided comprising: a first layer, including N-acetylated chitosan and a second layer including a porous substrate, membrane, wherein the first layer is coated upon the second layer. A method of forming, a composite membrane is also provided comprising the steps of: forming a porous, substrate membrane, depositing …
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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 August 17, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 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.