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. 02, 1993
Filed:
Aug. 02, 1991
Applicant:
Inventors:
Hiroshige Okinoshima, Annaka, JP;
Hiroshi Kanbara, Takasaki, JP;
Assignee:
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528353 ; 528 26 ; 528 28 ; 528125 ; 528126 ; 528128 ; 528170 ; 528172 ; 528173 ; 528176 ; 528220 ; 528350 ;
Abstract
The present polyamido-acid copolymer has a polymerization backbone chain represented by the following formula: ##STR1## wherein q represents a bivalent organic group and R represents a tetravalent aromatic group. This copolymer forms a polyimide resin film excellent in adhesion to various inorganic substances and mechanical strength.