Use of a catalytic system for lactide and glycolide (co)oligomerization
CA 2559570 C · Owner: Ben, Frederic · Inventors: Graullier, Magalie; Bourissou, Didier; Cherif-Cheikh, Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of a catalytic ring-opening lactide and glycolide (co)oligomerization system consisting of a strongly acidic ion-exchange resin-type polymeric catalyst and a (co)oligomerization additive and a lactide and glycolide (co)oligomerization method using said catalytic system are disclosed.
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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 March 15, 2005 and granted April 30, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.