Catalyst system and its use in olefin polymerization
CA 2428855 A1 · Owner: Karol, Frederick · Inventors: Kao, Sun-Chueh; Karol, Frederick; Sher, Jaimes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymerization catalyst system and a method for preparing the catalyst system is disclosed. The catalyst system includes a bulky ligand metallocene catalyst compound, preferably containing a single cyclopentadienyl or substituted cyclopentadienyl-type ring system a Group 13 element containing , first modifier and a cycloalkadiene second modifier. The present invention also provides a process for polymerizing olefins(s) utilizing the catalyst systems described herein.
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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 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 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.