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:
Mar. 26, 2007
Filed:
Jul. 16, 1997
Andreas Winter, Neuleiningen, DE;
Martin Antberg, Hofheim am Taunus, DE;
Walter Spaleck, Bremen, DE;
Jürgen Rohrmann, Kelkheim, DE;
Volker Dolle, Bensheim, DE;
Andreas Winter, Neuleiningen, DE;
Martin Antberg, Hofheim am Taunus, DE;
Walter Spaleck, Bremen, DE;
Jürgen Rohrmann, Kelkheim, DE;
Volker Dolle, Bensheim, DE;
Basell Polyolefine GmbH, , DE;
Abstract
The novel metallocenes of the formula Iin which, preferably, Mis Zr or Hf, Rand Rare alkyl or halogen, Rand Rare hydrogen, Rand Rare alkyl or haloalkyl, —(CRR)—R—(CRR)— is a single- or multi-membered chain in which Rmay also be a (substituted) hetero atom, m+n is zero or 1, and Ris hydrogen, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high stereospecificity and high melting point.