Catalysts containing per-ortho aryl substituted aryl or heteroaryl substituted nitrogen donors
CA 2421054 A1 · Owner: Ponasik, James Allen Jr. · Inventors: Mackenzie, Peter Borden; Barrett, Anthony Gerard Martin; Smith, Thomas William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalyst compositions useful for the polymerization of olefins are disclosed. These compositions comprise a Group 8-10 metal complex comprising a bidentate or variable denticity ligand comprising two nitrogen donor atoms independently substituted by an aromatic of heteroaromatic ring(s) wherein the ortho , positions of said ring(s) are substituted by aryl or heteroaryl groups. Also disclosed are proceses for the polymerization of olefins using the catalyst compositions.
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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 September 11, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 11, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2023.
- 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
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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.