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. 10, 1989
Filed:
Jan. 27, 1986
Applicant:
Inventors:
Shigeru Kurosawa, Ohita, JP;
Kunio Matsuki, Ohita, JP;
Assignee:
Showa Denko Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525420 ; 528172 ;
Abstract
Polyether sulfone imide copolymers having excellent mechanical strength, heat resistance and heat aging resistance and enhanced processability are disclosed, which are composed of recurring units of the following formulae (I) and (II) ##STR1## wherein Ar.sup.1 represents a residue of a dihydric phenol, Ar.sup.2 represents a residue of an aminophenol, and Ar.sup.3 represents a residue of an aromatic tetracarboxylic acid.