Process for the polymerization of ethylene and a small amount of a diene
CA 2400665 A1 · Owner: Zhang, X. Simon · Inventors: Litteer, Dwayne L.; Zhang, X. Simon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a polymerization process utilizing a low level of diene to control the polymer product's melt index ratio independently of the melt index and density. The process of the invention produces polymers with enhanced processability. More specifically the process produces ethylene based polymers, prepared in gas phase polymerization processes utilizing bulky ligand metallocene polymerization catalysts having enhanced melt strength and , shear-thinning behaviour.
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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 31, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2023.
- 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.