Biocompatible polymers, preparation method and compositions containing same
CA 2337328 C · Owner: Caruelle, Jean-Pierre · Inventors: Barritault, Denis; Caruelle, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a biocompatible polymer consisting of a sequence of identical or different motifs of the general formula (I): A¿a? X¿x? Y¿y? wherein: A represents a monomer; X represents a carboxyl group fixed on a monomer A; Y represents a sulphate or sulphonate group fixed on a monomer A; a represents the number of monomers A; x represents the substitution rate of the set of monomers A by the groups X; y represents the substitution rate of the set of monomers A by the groups Y. The invention further concerns the pharmaceutical and diagnostic compositions containing at least one polymer of general formula (I).
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 July 20, 1999 and granted October 18, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2021.
- 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.