Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-05-29
2007-05-29
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S114000, C526S115000, C526S116000, C526S117000, C526S170000, C526S160000, C526S943000, C502S103000, C556S053000
Reexamination Certificate
active
11169895
ABSTRACT:
A multinuclear transition metal compound which has two or more catalytic active sites, and is useful in preparing the olefin polymer and copolymer, is disclosed. The multinuclear transition metal compound for olefin polymerization includes two or more metals, and at least one ligand having a cyclopentadienyl moiety, which connects the two or more metals. The preferable multinuclear transition metal catalyst for olefin polymerization includes the first transition metal, the first η ligand having a cyclopentadienyl moiety, which is coordinated to the first transition metal, and the second transition metal to which the second η ligand having a cyclopentadienyl moiety is coordinated, wherein the second transition metal is bonded to the first η-ligand via a sigma (σ) bond.
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Hong Sah-Mun
Jun Young-Jae
Kang Sung-Woo
Oh Jin-Sook
Yoon Hyun-Ki
Birch & Stewart Kolasch & Birch, LLP
Daelim Industrial Co., Ltd.
Lee Rip A.
Wu David W.
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