Nitrogen-containing group-13 anionic compounds for olefin polymerization
CA 2407071 A1 · Owner: Exxon Chemical Patents Inc. · Inventors: Rodriguez, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention addresses a composition of matter comprising a cation Ct+ and an anion A-, the anion comprises a core Group-13 element bound to partially or completely fluorinated fluoroaryl ligands at least one of the fluoroaryl , ligands is substituted with a Group-15 element that has been rendered essentially inert for subsequent chemical reaction through its unbonded electron pair by substituting an electron-withdrawing group on it. Ct+ may be selected from anilinium and ammonium cations trityl carbenium cations, Group-11 metal cations silylium cations, the cations of the hydrated salts of Group-1 or -2 metals, and derivatives of the foregoing anilinium ammonium, trityl carbenium, …
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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 April 3, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2023.
- 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
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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.