Monocyclopentadienyl complexes of chromium, molybdenum or...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C502S102000, C502S117000, C502S120000, C502S159000, C526S127000, C526S160000, C526S352000, C526S943000, C556S011000, C556S012000, C556S021000, C556S060000

Reexamination Certificate

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06838563

ABSTRACT:
Substituted monocyclopentadienyl, monoindenyl, monofluorenyl and heterocyclopentadienyl complexes of chromium, molybdenum or tungsten in which at least one of the substituents on the cyclopentadienyl ring carries a donor function which is bonded rigidly, not exclusively via sp3-hybridized carbon or silicon atoms, and a process for the polymerization of olefins.

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