Canadian application, no grantCanada
Ionic polymerization of vinyl aromatic monomers
CA 2252150 A1 · Owner: Nova Chemicals Ltd. · Inventors: Mckay, Ian; Ciupa, Alison
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the ionic polymerization of co-and homopolymers of vinyl aromatic monomers in the presence of borate catalysts. The reaction proceeds very rapidly at low temperatures. 1
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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 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 28, 1998
GrantedNo grant recorded
Term endedOctober 28, 2018
Patent numberCA 2252150 A1
Classification (IPC)C08F4/12 +1 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.