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. 17, 1976
Filed:
Dec. 19, 1974
Applicant:
Inventors:
Walter P Barie, Jr, Shaler Township, PA (US);
Anatoli Onopchenko, Monroeville, PA (US);
Johann G Schulz, Pittsburgh, PA (US);
Assignee:
Gulf Research & Development Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260 / ; 260 302 ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 428458 ; 428474 ;
Abstract
A novel polyamic acid intermediate composition in a polar, aprotic solvent and the corresponding fully condensed polyimide are prepared from 3,3',4,4'-benzhydrol tetracarboxylic dianhydride and a diamine having at least two carbon atoms such as bis(4-aminophenyl)ether.