Catalyst systems for ethylene oligomerisation to linear alpha olefins
CA 2499844 A1 · Owner: De Boer-Wildschut, Marijke · Inventors: Van Zon, Arie; De Boer-Wildschut, Marijke; De Boer, Eric Johannes Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst system comprising: (a) one or more bisarylimino pyridine iron or cobalt catalysts; (b) a first co-catalyst compound which is selected from aluminium alkyls, aluminoxanes, and mixtures thereof; and (c) a second cocatalyst compound which comprises one or more compounds of the formula ZnR~2 wherein each R~, which may be the same or different is selected from , hydrogen, optionally substituted C1-C20 hydrocarbyl phenyl, C1, Br, I, SR~~, NR~~ 2, OH, OR~~ CN, NC wherein R~~ , which within the same molecule may the same or different, is C1-C20 hydrocarbyl.
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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 23, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 23, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 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.