Polymerisation catalysts
CA 2294943 A1 · Owner: Bp Chemicals Limited · Inventors: Rodewald, Stephan; Little, Ian Raymond; Garcia, Eliane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Transition metal complexes suitable for use for the polymerisation of olefins comprise unsaturated groups having Lewis Base functionality. Preferred groups are dienes having dialkylamino functionality. The complexes may suitably be supported by the use of the functionalised dienes to give transition metal complexes which in the presence of activators are particularly suitable for gas phase processes.
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 June 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 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.