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:
Feb. 12, 1985
Filed:
Nov. 10, 1982
Applicant:
Inventors:
Bappalige N Achar, Karnataka, IN;
George M Fohlen, Millbrae, CA (US);
John A Parker, Los Altos, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528229 ; 528125 ; 528126 ; 528128 ; 528166 ; 528185 ; 528186 ; 528187 ; 528226 ; 528352 ; 528353 ;
Abstract
Method of forming 4,4',4',4''-tetraamino phthalocyanines by reducing 4,4',4',4''-tetranitro phthalocyanines, polymerization of the metal tetraamino phthalocyanines with a tetracarboxylic dianhydride (preferably aromatic) or copolymerization with a tetracarboxylic dianhydride and a diamine (preferably also aromatic) to produce amic acids which are then dehydrocyclized to imides. Thermally and oxidatively stable polymers result which form tough, flexible films, etc.