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:
Sep. 25, 2001
Filed:
Apr. 27, 1995
Isao Tomioka, Kyoto, JP;
Takeshi Nakano, Kyoto, JP;
Mikio Furukawa, Kyoto, JP;
Yoshiaki Echigo, Kyoto, JP;
Masato Wada, Kyoto, JP;
Unitika Ltd., Hyogo, JP;
Abstract
A polyimide precursor fibrid material which comprises a polyimide precursor that forms a polyimide having a property of no thermal melting when subjected to a ring closure reaction and which is substantially free from aprotic polar organic solvents, and polyimide paper, polyimide composite paper and polyimide composite board obtained therefrom. Since the inventive polyimide precursor fibrid material does not contain aprotic polar organic solvents, a polyimide paper product having excellent strength can be obtained from the polyimide precursor fibrid material, and a polyimide composite paper product and a polyimide composite board both consisting of uniformly dispersed components and having excellent strength can be obtained from the polyimide precursor fibrids and other staple fibers.