Catalyst composition for ethylene polymerization
CA 2539505 C · Owner: Union Carbide Chemicals And Plastics Technology Corporation · Inventors: Reib, Robert N.; Chen, Linfeng; Tilston, Michael W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for polymerizing an olefin monomer comprising: (i) contacting, in a reactor the olefin monomer consisting of , ethylene with a catalyst composition comprising one or more Group 3-10 transition metal containing Ziegler-Natta procatalyst compounds; and one or more alkylaluminum cocatalysts; (ii) providing to the reactor one or more polymerization control agents, wherein at least one such polymerization control agent is an alkyl or aryl ester of an , aliphatic or aromatic (poly)carboxylic acid optionally containing one or more substituents comprising a Group 13, 14 15, or 16 heteroatom and the , polymerization control agents is or are provided at a …
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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 18, 2004 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2026.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.