Expired Canadian patentCanada
Process for controlling gas phase fluidized bed polymerization reactor
CA 2201223 C · Owner: Univation Technologies, Llc · Inventors: Lee, Kiu Hee; Parrish, John Roberts; Jacobsen, Lance Lyle
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Control of a gas phase polymerization reactor is performed with the product melt index, the reaction temperature and the partial pressure of the controlling reactant.
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 27, 1997 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 27, 1997
GrantedDecember 12, 2000
Term endedMarch 27, 2017
Patent numberCA 2201223 C
Classification (IPC)C08F2/34 +2 more
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.