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:
Jul. 07, 2015
Filed:
Sep. 02, 2011
Silvia Soffritti, Ferrara, IT;
Riccardo Rinaldi, Mantova, IT;
Maurizio Dorini, Porto Mantovano, IT;
Giuseppe Penzo, Mantova, IT;
Silvia Soffritti, Ferrara, IT;
Riccardo Rinaldi, Mantova, IT;
Maurizio Dorini, Porto Mantovano, IT;
Giuseppe Penzo, Mantova, IT;
Basell Poliolefine Italia S.r.l., Milan, IT;
Abstract
A gas-phase polymerization reactor having interconnected polymerization zones comprising:—a riser through which the polymer particles flow upwards under fast fluidization conditions or transport conditions;—a downcomer through which the polymer particles flow downward in a densified form under the action of gravity, the bottom of said downcomer being connected to the lower region of said riser by means of a transport section, said transport section being designed as a bend descending from the downcomer to the riser.