Crosslinking of low-molecular weight and high-molecular weight polysaccharides; preparation of injectable monophase hydrogels; polysaccharides and hydrogels obtained
CA 2521961 C · Owner: Corneal Industrie · Inventors: Lebreton, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to:, - a process for the crosslinking of at least one polymer selected from polysaccharides , and derivatives thereof, which is carried out in an aqueous solvent by the action of an effective and non-excessive amount of at least one crosslinking agent, characterized in that it is carried out on a mixture containing at least one low-molecular weight polymer and at least one high-molecular weight polymer;, - a process for the preparation of an injectable monophase hydrogel of at least one crosslinked polymer selected from polysaccharides and derivatives thereof; and, - the crosslinked polymers and injectable monophase hydrogels respectively obtainable by …
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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 April 8, 2004 and granted July 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2026.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.