Transition metal compounds, catalysts for the production of .alpha.-olefins and process therefor
CA 2347385 A1 · Owner: Idemitsu Petrochemical Co. Ltd. · Inventors: Kuramoto, Masahiko; Tanaka, Shinji; Tashiro, Hironori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds represented by general formula (1); and catalysts for the production of .alpha.-olefins containing the same wherein M is one of Group 8 to 10 transition metals of the periodic table; R1 to R3 and R6 to R15 are each H halogeno, C1-C20 hydrocarbyl, or a heteroatom-containing group with at least , either of R6 and R10 or at least either of R11 and R15 being H; R4 and R5 are each H or C1-C20 hydrocarbyl, with at least either of them being H or (substituted) aryl; X is a group attached by a covalent or ionic bond; and n is the valence of M.
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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 August 31, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 2022.
- 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.