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:
Feb. 04, 2020
Filed:
Apr. 25, 2018
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Jo Ann M. Canich, Houston, TX (US);
Ian C. Stewart, Houston, TX (US);
Ilya S. Borisov, Moscow, RU;
Bogdan A. Guzeev, Moscow, RU;
Dmitry V. Uborsky, Moscow, RU;
Alexander Z. Voskoboynikov, Moscow, RU;
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
Disclosed are novel hafnium-based metallocene catalyst compounds with the following characteristics: 1) 4,5-dialkyl substitutions on a fluorenyl ligand, and optionally additional substitutions, 2) a cyclopentadienyl ligand, optionally with substitutions, and 3) a bridging group from group 14 of the Periodic Table. Also disclosed are catalyst systems comprising such catalyst compounds and their uses thereof, and polymers produced using such catalyst systems.