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. 01, 1997
Filed:
May. 20, 1996
Applicant:
Inventors:
Riccardo Po', Livorno, IT;
Luigi Pelosini, Fontaneto D'Agogna, IT;
Ernesto Occhiello, Novara, IT;
Luisa Fiocca, Florence, IT;
Assignee:
Enichem S.p.A., Milan, IT;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528272 ; 2641761 ; 26417713 ; 264299 ; 2643281 ; 428 341 ; 502150 ; 502200 ; 502202 ; 502232 ; 525437 ; 525444 ; 528296 ; 528298 ; 528299 ; 528302 ; 528305 ; 528307 ; 528308 ;
Abstract
In the present invention, a class of catalysts is described, to be used in the polycondensation stage in the synthesis of poly(ethylene terephthalate), constituted by a composition of metal derivatives in quantity so that the content of these in the final polymer is below 130 ppm.