Ziegler-Natta catalyst

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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Reexamination Certificate



The present invention relates generally to catalysts, to methods of making catalysts, to methods of using catalysts, to methods of polymerizing, and to polymers made with such catalysts. More particularly, the present invention relates to polyolefin catalysts and to Ziegler-Natta catalysts, to methods of making such catalysts, to methods of using such catalysts, to polyolefin polymerization, and to polyolefins.

patent: 6486274 (2002-11-01), Gray et al.
patent: 6930071 (2005-08-01), Knoeppel et al.
patent: 2003/0018143 (2003-01-01), Gray et al.
patent: 2005/0085601 (2005-04-01), Vizzini et al.
patent: 2005/0209094 (2005-09-01), Knoeppel et al.
patent: 2007/0299224 (2007-12-01), Vizzini


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