Aluminium compounds for producing vinylic polymers
CA 2335476 A1 · Owner: Irvine, Derek John · Inventors: Gibson, Vernon Charles; Cameron, Paul Alexander; Irvine, Derek John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An enolate functionalised reaction intermediate of general formula (I) wherein X is an alkyl group; Z is selected from the group consisting of alkyl hydrogen, halogen, alkoxy, thiol, aryloxy or ester; n is an integer and is at least one; Y is alkyl or H; the tetradentate ligand around the A1 is optionally substituted. Also claimed is a process for the preparation of the enolate functionalised reaction intermediate and its reaction with a vinylic monomer and a Lewis acid to produce the corresponding vinylic polymer.
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 June 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 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.