Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-11-26
2010-06-08
Mayes, Melvin C (Department: 1793)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S126000, C526S141000, C502S104000
Reexamination Certificate
active
07732540
ABSTRACT:
A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a halogen atom, (B) an organoaluminum compound and/or organoaluminumoxy compound, and (C) a nitrogen-containing aromatic heterocyclic compound, whose one or more carbon atoms adjacent to its nitrogen atom are linked to an electron-withdrawing group, or a group containing an electron-withdrawing group; and a process for producing an olefin copolymer using the an olefin copolymerization catalyst.
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Corresponding Application No., filed concurrently herewith of same inventors and title, application number not yet known.
Kumamoto Shin-ichi
Nakahara Shinya
Corno James
Mayes Melvin C
Panitch Schwarze Belisario & Nadel LLP
Sumitomo Chemical Company Limited
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