Dextran derivatives, preparation method and applications as medicine with specific biological action
CA 2280949 C · Owner: Correia, Jose · Inventors: Chaubet, Frederic; Jozefowicz, Marcel; Correia, Jose
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns dextran derivatives their applications as medicines with specific biological action and their preparation method. Said derivatives correspond to the general formula DMC¿a?B¿b?SU¿c?S¿d? in which: D represents a polysaccharide chain preferably consisting of sequences of glucoside units MC represents methylcarboxylate groups B represents carboxymethylbenzylamide groups Su represents sulphate groups, S represents sulphonate groups <u>a</u>, <u>b</u>, <u>c</u> and <u>d</u> represent the degree of substitution (ds) respectively in groups MC, B, Su and S; <u>a</u> being equal to 0 or ?0.3 <u>b</u> being equal to 0 or ?0.1, <u>c</u> being equal to 0 or ?0.1 and <u>d</u> being …
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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 11, 1998 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2020.
- 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.