Substituted polycyclic, fused ring metal complexes and polymerization process
CA 2482813 A1 · Owner: Klosin, Jerzy · Inventors: Timmers, Francis J.; Feng, Shaoguang S.; Klosin, Jerzy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal complexes comprising a polycyclic fused ring ligand comprising at , least: (1) a cyclopentadienyl ring (2) a =J* substituted 7 membered , polyatomic ring where =J* is =(C)c=CR*2, =NR*, or =0, where R* is hydrogen C1-10 hydrocarbyl, N,N-di(C1-4 alkyl)amino or halogen, and c is 0, 1 or 2; , and (3) one or more aromatic ring systems with the proviso that said , substituted 7 membered ring (2) is fused to both the cyclopentadienyl ring (1), and said one or more aromatic ring systems (3) polymerization catalysts, and olefin polymerization processes using the same 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 April 8, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2025.
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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.