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:
Nov. 07, 2000
Filed:
Jun. 07, 1995
Richard Allen Fisher, League City, TX (US);
Exxon Chemical Patents Inc., Houston, TX (US);
Abstract
This invention relates to single site catalyst systems comprising activated bimetallocyclic transition metal compounds, and the use of these catalyst systems for the polymerization of ethylenically and acetylenically unsaturated monomers. The bimetallocyclic compounds comprise two metal atoms, selected from the group consisting of Group 4 or Group 5 metal atoms, connected through two covalent bridging links so as to form a cyclic compound having delocalized bonding in the cyclic structure. The exemplary bimetallocyclic compound bis-M-(trimethylsilyl-methylidyne) tetrakis-(trimethylsilylmethyl) ditantalum activated with alumoxane and borate compounds is shown to be useful for preparing ethylene polymers having M.sub.n of at least 267,000 and MWD of about 2.3.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile