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. 10, 1999
Filed:
Mar. 22, 1996
Applicant:
Inventors:
Davino Gelosa, Travaco' Siccomario, IT;
Roberto Ruggieri, Milan, IT;
Andrea Sliepcevich, Cormano, IT;
Franco Codignola, Milan, IT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562565 ;
Abstract
An oligomer of an aspartic acid is provided having repeating monomeric units of aspartic acid of the formula: ##STR1## and by a first chain unit having formula: ##STR2## and a chain stopper unit A which is: ##STR3## wherein X is an alkali metal, R represents H or an alkyl containing from 1 to 4 carbon atoms and R.sub.1 is H or the group --COOX.