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:
Jun. 08, 1982
Filed:
Feb. 25, 1980
Applicant:
Inventors:
Alberto Greco, Dresano, IT;
Guglielmo Bertolini, Pavia, IT;
Assignees:
Anic S.p.A., Palermo, IT;
Snamprogetti S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ; C07F / ; C07F / ;
U.S. Cl.
CPC ...
2604 / ; 2604293 ; 2604295 ; 2604 / ;
Abstract
Alkoxides of transition metals, selected from among tetravalent Ti, tetravalent and pentavalent V, tetravalent Cr and tetravalent Zr, actinides and lanthanides, are reduced to corresponding alkoxides of lower valency by reacting such higher valency metal alkoxides, in liquid phase, with vapors of metals of the alkaline earth group, the III group and the IV group metals and magnesium. Very efficient polymerization catalysts for the polymerization of unsaturated compounds are thus obtained.