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
2009-10-20
Choi, Ling-Siu (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S141000, C526S125300, C526S128000, C526S124200, C526S348000, C502S125000, C502S162000, C502S103000, C502S116000
Reexamination Certificate
active
07605215
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-donating group, or a group containing an electron-donating group; and a process for producing an olefin copolymer using the an olefin copolymerization catalyst.
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Corresponding U.S. Appl. No. 11/945,019, filed concurrently herewith of same inventors and title, not yet known.
Kumamoto Shin-ichi
Nakahara Shinya
Choi Ling-Siu
Panitch Schwarze Belisario & Nadel LLP
Sumitomo Chemical Company Limited
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