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:
Aug. 20, 1991
Filed:
Jun. 26, 1989
Applicant:
Inventors:
Masahiro Ohta, Yokohama, JP;
Saburo Kawashima, Yokosuka, JP;
Katsuaki Iiyama, Odawara, JP;
Shoji Tamai, Yokohama, JP;
Hideaki Oikawa, Yokohama, JP;
Akihiro Yamaguchi, Kamakura, JP;
Assignee:
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528125 ; 528126 ; 528128 ; 528229 ; 528350 ; 528353 ;
Abstract
Disclosed is a process for preparing a polyimide by reacting certain reactants. The reactants include an aromatic diamine which is 3,3'-diaminobenzophenone and/or bis(3-aminophenyl)sulfone, a tetrocarboxylic dianhydride and a dicarboxylic anhydride. A thermally stable polyimide can be obtained which displays excellent processability.
Quick Actions:
Ohta, Masahiro. (1991). Process for preparing polyimide having excellent high temperature (U.S. Patent No. 5041520). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5041520
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile