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:
Dec. 03, 1991
Filed:
Feb. 22, 1991
Applicant:
Inventors:
Francesco Masi, San Donato Milanese, IT;
Angelo Moalli, Castelletto Ticino, IT;
Renzo Invernizzi, Milan, IT;
Francesco Menconi, Massa Macinaia, IT;
Cesare Ferrero, Monza, IT;
Stefano Malquori, Castelfiorentino, IT;
Lia Barazzoni, Piacenza, IT;
Mario Polesello, Oderzo, IT;
Assignee:
Enichem Anic S.p.A., Palermo, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
502-9 ; 502111 ; 502117 ; 526125 ;
Abstract
A solid catalyst component for the low-pressure polymerization of ethylene and C.sub.3 -C.sub.10 alpha-olefins into very high molecular weight polyolefins is in the form of a spherical granular solid having a surface area of between 20 and 40 m.sup.2 /g, a mean pore radius of between 5,000 and 40,000 .ANG. and a porosity of between 40 and 90 vol %, and is definable by the following formula (in atomic proportions: