Method of controlling olefin polymerization catalyst composition activity
CA 2277055 A1 · Owner: Schreck, David James · Inventors: Wenzel, Timothy Todd; Schreck, David James; Peterson, Thomas Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of controlling the olefin polymerization activity of an unsupported liquid form catalyst composition prepared by contacting a single site catalyst precursor with an activating cocatalyst outside of a polymerization reactor is provided. The method comprises adjusting at least one of: a) the period of time the single site catalyst precursor and the activating cocatalyst are contacted; b) the concentrations of the single site catalyst precursor and the activating cocatalyst during contacting; c) the mole ratio of the single site catalyst precursor to the activating cocatalyst during contacting; d) the temperature during contacting; and e) the degree of mixing of the single site …
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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 January 8, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2020.
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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.