Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-04-25
2006-04-25
Lorengo, J. A. (Department: 1755)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C546S010000, C556S032000, C556S033000, C556S034000, C556S035000, C556S137000, C556S138000, C556S140000, C502S159000, C502S160000, C502S162000, C502S167000
Reexamination Certificate
active
07034157
ABSTRACT:
Olefin polymerization catalyst precursors are described herein. The precursors are generally characterized by the formula:wherein M is a transition metal selected from groups 8 to 10 of the Periodic Table; n is an integer of from 1 to 3; Q is a halogen or a C1to C2alkyl group; PY is a pyridinyl group, which is coordinated with M through the nitrogen atom of said pyridinyl group; R′ is a C1to C20hydrocarbyl group; R″ is a C1to C20hydrocarbyl group; A1is a monoaromatic group, which is substituted or unsubstituted; and A2includes multiple aromatic groups, which are substituted or unsubstituted.
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Lopez Margarito
Marin Vladimir
Razavi Abbas
Fina Technology, Inc.
Jackson William D.
Krueger Tenley R.
Lorengo J. A.
Pasterczyk J.
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