Nickel diimine catalysts with methylalumoxane as cocatalyst, method of polymerization of olefins therewith and polymers produced
CA 2311624 A1 · Owner: Hawley, Gil R. · Inventors: Eilerts, Nancy W.; Hawley, Gil R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Tetrasubstituted diphenyl diimine nickel complexes further comprising e.g. ACAC ligands and their fluorinated analogs as additional ligands are used in conjunction with methylalumoxane and a support to polymerize alpha olefins or copolymerize plural alpha olefins in the slurry phase.
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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 8, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2020.
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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.