Expired Canadian patentCanada
Polymerisation catalysts
CA 2377184 C · Owner: Bertrand, Guy · Inventors: Bertrand, Guy; Martin-Vaca, Blanca; Dumitrescu, Anca
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns novel compounds having a lanthanide and a tridentate ligand a method for preparing them and their use in particular as polymerisation catalysts.
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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 June 23, 2000 and granted March 29, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 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.
FiledJune 23, 2000
GrantedMarch 29, 2011
Term endedJune 23, 2020
Patent numberCA 2377184 C
Classification (IPC)C07F5/00 +2 more
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.