Catalyst for polmerizing an olefin and process for polymerizing an olefin by using such catalyst
CA 1325629 C · Owner: Toyota, Akinori · Inventors: Kashiwa, Norio; Tsutsui, Toshiyuki; Kioka, Mamoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An olefin is polymerized or copolymerized in the presence of an olefin-polymerizing catalyst prepared from (A) a transition-metal compound or (A') a transition-metal compound loaded on a fine-particle carrier said, transition metal being selected from group IVB in the periodic table; (B) an aluminoxane; and (C) an organoaluminum compound represented by the general formula I or II:, R1mAl(OR2)3-m I, R3nAl(OSiR43)3-n II wherein R1, R2, and R3 are independently selected from hydrocarbon radicals, R4 is selected from the group consisiting of hydrocarbon, alkoxy, and aryloxy radicals and m and n are independently a positive number of more than 0 and less than 3. This catalyst has a significantly …
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
- Granted December 28, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 2010.
- 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.