Supported catalysts and olefin polymerization processes utilizing same
CA 2366006 A1 · Owner: W.R. Grace & Co.-Conn. · Inventors: Connor, Eric F.; Bansleben, Donald A.; Henderson, Jason I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Non-ionic late transition metal chelates of salicylaldimine and pyrrolaldimine can be tethered to an innert support by a covalent bond organic group to provide a catalyst useful in slurry and gas phase polymerization of olefins.
Read the whole patent
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 March 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2022.
- 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.