Water insoluble derivatives of polyanionic polysaccharides
CA 2394582 A1 · Owner: Calias, Pericles · Inventors: Miller, Robert J.; Calias, Pericles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water insoluble, biocompatible gel is prepared by reacting carboxymethylcellulose and a carbodiimide wherein the reaction is conducted , in an aqueous medium containing a water miscible organic solvent such as a , lower alkanol, an alkyl pyrrolidone DMSO or acetone. The present method , permits the reaction to contain higher concentrations of carboxymethylcellulose and less carbodiimide than conventional methods.
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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 December 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2022.
- 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.