Process for the preparation of alumoxanes
CA 1258265 A · Owner: Exxon Chemical Patents Inc. · Inventors: Welborn, Howard C. Jr.; Tornqvist, Erik G.M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of hydrocarbylalumoxanes comprising oligomeric, linear and/or cyclic hydrocarbylalumoxanes which, comprises contacting a hydrocarbylaluminum dissolved in an inert dry organic liquid with a hydrated salt of a metal which is Dot reduced during contact with the trihydrocarbylaluminum at temperatures between -30°C and 110°C. Alumoxanes are useful as catalyst components forpolymerization catalysts.
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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
- Granted August 8, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 8, 2006.
- 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.