Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-05-08
2007-05-08
Choi, Ling-Sui (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S161000, C526S160000, C526S170000, C526S943000, C556S051000, C556S052000
Reexamination Certificate
active
11176723
ABSTRACT:
The present invention is directed to a novel composition, and to a method of making the composition, the composition being useful in catalyst systems for the homopolymerization and/or copolymerization of olefins, wherein such catalyst systems display a higher level of activity and stereoselectivity than previously reported. The present invention is also directed to novel polymeric compositions made with such catalyst systems, such as a novel syndiotactic polypropylene that melts at temperatures higher than previously reported.
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Irwin Levi J.
Miller Stephen A.
Choi Ling-Sui
Lee Rip A.
Shaddox Robert C.
The Texas A&M University Systems
Winstead Sechrest & Minick P.C.
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