Polymerisation process
CA 2332002 A1 · Owner: Bp Chemicals Limited · Inventors: Leaney, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the gas phase polymerisation of one or more alpha-olefins in the presence of a polymerisation catalyst system under reactive conditions in a fluidised bed reactor which process comprises introducing into the reactor a deactivating agent characterised in that the deactivating agent is introduced close to the reactor wall and that said introduction does not terminate the polymerisation reaction.
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 May 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2021.
- 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.