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:
Apr. 21, 2026
Filed:
Nov. 19, 2021
Compagnie Generale Des Etablissements Michelin, Clermont-Ferrand, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Ecole Supérieure DE Chimie Physique Electronique DE Lyon, Villeurbanne, FR;
Université Claude Bernard Lyon 1, Villeurbanne, FR;
Nicolas Baulu, Clermont-Ferrand, FR;
Christophe Boisson, Tramoyes, FR;
Franck D'agosto, Genas, FR;
Robert Ngo, Clermont-Ferrand, FR;
Julien Thuilliez, Clermont-Ferrand, FR;
François Jean-Baptiste-Dit-Dominique, Clermont-Ferrand, FR;
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
ECOLE SUPERIEURE DE CHIME PHYSIQUE ELECTRONIQUE DE LYON, Villleurbanne, FR;
UNIVERSITE CLAUDE BERNARD LYON 1, Villleurbanne, FR;
Abstract
A catalytic system based on at least one rare-earth metallocene and as co-catalyst an organomagnesium reagent of formula X—Mg—R—Mg—X is provided. In the formula, Ris a divalent aliphatic hydrocarbon-based chain, optionally interrupted with an oxygen atom, a sulfur atom or with an arylene group, and X is a halogen atom. The catalytic system allows the synthesis of dienic and/or ethylenic telechelic polymers.