The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2007
Filed:
Apr. 21, 2004
Joerg Schottek, Frankfurt, DE;
Nicola Stefanie Paczkowski, Loveland, OH (US);
Andreas Winter, Neuleiningen, DE;
Thorsten Sell, Frankfurt, DE;
Joerg Schottek, Frankfurt, DE;
Nicola Stefanie Paczkowski, Loveland, OH (US);
Andreas Winter, Neuleiningen, DE;
Thorsten Sell, Frankfurt, DE;
Novolen Technology Holdings C.V., The Hague, NL;
Abstract
A catalyst system includes a metallocene compound having the formula RLLMRRwherein Ris a bridge between ligands Land Land Mis a metal of Group IVB of the Periodic Table such as titanium, zirconium and hafnium and Rand Rcan be hydrogen or aliphatic or aromatic groups. Bridge Rcan include silicon, germanium or tin. The metallocene compound of the invention as synthesized has a racemic to meso isomer ratio of greater than 5 to 1, thereby precluding the need for subsequent separation of the meso isomer.