Bimetallic polymerization catalysts comprising multidentate ligands
CA 2425509 A1 · Owner: Nagy, Sandor · Inventors: Nagy, Sandor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bimetallic olefin polymerization catalyst is described. The catalyst comprises an organometallic compound, and optionally an activator. The , organometallic compound comprises a Group 3-5 transition or lanthanide metal M1, a Group 6-10 transition metal, M2, and a multidentate ligand characterized by a cyclopentadienyl group that is covalently linked to two Group 15 atoms wherein the cyclopentadienyl group is .pi.-bonded to M1 and the two Group 15 atoms are coordinated to M2. The bimetallic catalyst is useful for producing copolymers from ethylene without using a co-monomer by oligomerizing ethylene and simultaneously polymerizing ethylene and the co-formed oligomer.
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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 October 11, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2023.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.