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. 07, 2000
Filed:
Nov. 02, 1998
Applicant:
Inventors:
Takashi Kohno, Yamaguchi, JP;
Hideaki Okihara, Yamaguchi, JP;
Akinori Otani, Yamaguchi, JP;
Susumu Morishige, Yamaguchi, JP;
Assignee:
Ube Industries, Ltd., Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428220 ; 428409 ; 428416 ; 428458 ; 4284735 ; 528353 ;
Abstract
An aromatic polyimide film which is favorably employed for preparing a laminate of an aromatic polyimide film, an adhesive layer, and an electroconductive sheet is made of a polyimide prepared from a tetracarboxylic acid component containing at least 15 molar % of biphenyltetracarboxylic acid (or its dianhydride or ester) and an aromatic diamine component containing at least 5 molar % of phenylenediamine, has a specific edge tearing resistance of 11 to 22 kg/20 mm/10 .mu.m, and contains not more than 0.4 weight percent of a volatile component.