Canadian application, no grantCanada
Preparation of aluminoxanes
CA 2063520 A1 · Owner: Ethyl Corporation · Inventors: Sangokoya, Samuel Ayodele
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case OR-6303, PREPARATION OF ALUMINOXANES Abstract of the Disclosure, Hydrocarbyl aluminoxanes such as methylaluminoxanes are prepared by reacting a hydrocarbylaluminum compound with a hydrate of an alkali metal halide.
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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 March 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2014.
- 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 19, 1992
GrantedNo grant recorded
Term endedMarch 19, 2012
Patent numberCA 2063520 A1
Classification (IPC)C07F5/06 +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.