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:
Oct. 18, 1994
Filed:
Aug. 17, 1992
Applicant:
Inventors:
Suh Bong Rhee, Yousung-Ku, KR;
Ji Y Chang, Yousung-Ku, KR;
Bong S Moon, Suh-Ku, KR;
Ji-Woong Park, Yoosung-Ku, KR;
Assignee:
Korea Research Institute of Chemical Technology, Daejun, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528353 ; 528125 ; 528126 ; 528128 ; 528170 ; 528172 ; 528173 ; 528176 ; 528220 ; 528229 ; 528350 ; 528351 ; 560 36 ; 560 45 ; 560 48 ;
Abstract
A diamine compound of the general formula ##STR1## wherein the arrows denote isomerism, R.sub.1 is a divalent aromatic group selected from the group consisting of ##STR2## R.sub.2 is a tetravalent aromatic group selected from the group consisting of ##STR3## and R.sub.4 is a monovalent aliphatic group selected from the group consisting of ethyl and isopropyl; and, a process for preparing same.
Rhee, Suh. (1994). Copolyimides and a process for the preparation thereof (U.S. Patent No. 5357032). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5357032
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile