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:
Apr. 16, 1985
Filed:
Apr. 27, 1983
Applicant:
Inventors:
Masatoshi Yoshida, Oyama, JP;
Yasuo Miyadera, Shimodate, JP;
Assignee:
Hitachi Chemical Company, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08K / ; C08L / ;
U.S. Cl.
CPC ...
523310 ; 524738 ; 524741 ; 524879 ;
Abstract
A transparent and homogeneous polyimide resin solution produced by a process in which a tetracarboxylic acid component and an aromatic diamine component are subjected to polymerization and imidization by one step at 100.degree. to 200.degree. C. by use of a halogenated phenolic compound as a solvent, permits the formation of a polyimide film excellent in mechanical properties.