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:
Aug. 21, 1990
Filed:
Feb. 21, 1989
Applicant:
Inventors:
Roberto Santi, Novara, IT;
Giuseppe Cometti, Verbania, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560202 ; 560190 ; 562595 ; 502324 ; 502326 ; 502345 ;
Abstract
Process of synthetizing ethylene-tetracarboxylic esters by duplication of lonic compounds of the formula: ##STR1## wherein X=COOR, Y=COOR' and R and R' represent an organic group, characterized in that the duplication is an oxidative duplication conducted in the presence of a catalyst consisting of the salt of a transition metal.