| PATENT ASSIGNEE'S COUNTRY | Germany |
| UPDATE | 06.99 |
| PATENT ASSIGNEE | BASF AG |
| PATENT CLAIMS |
(A) Metallocene complex of the metals of the fourth, fifth or sixth transition group of Periodic Table (B) Lewis base compd forming metallocenium ion (C) Sterically hindered aryloxyaluminium compd |
| PATENT PHOTOCOPY | Available on request |
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