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:
Nov. 13, 1990
Filed:
Jan. 18, 1989
Applicant:
Inventors:
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
525390 ; 528125 ; 528126 ; 528128 ;
Abstract
An aromatic polymer comprises divalent aromatic units linked through oxygen, characterized in that some at least of those units are or contain aromatic rings free of electron-withdrawing groups and in that at least one of such rings carries at least one nitrogen radical linked to a nuclear carbon atom by a nitrogen-carbon bond. Preferably it consists to the extent of at least 75 mol percent by the repeating units: