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. 29, 2003
Filed:
Jul. 19, 2001
Applicant:
Inventor:
Tatsuo Tsumiyama, Ube, JP;
Assignee:
Ube Industries, Ltd., Ube, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 6/00 ; C08G 6/928 ; C08G 6/900 ;
U.S. Cl.
CPC ...
C08F 6/00 ; C08G 6/928 ; C08G 6/900 ;
Abstract
A process for production of polyimide molded bodies which comprises a step in which a polyimide resin powder obtained by polymerization and imidation of p-phenylenediamine with 3,3′,4,4′-biphenyltetracarboxylic acid, its ester or its dianhydride and -biphenyltetracarboxylic acid, its ester or its dianhydride is molded at a pressure of approximately 3,000-5,000 kgf/cm , and a step in which it is calcined at about 460-550° C. under low pressure. The polyimide molded bodies obtained thereby have a density in the range of 1.28-1.34 g/cm .