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:
Jul. 15, 1997
Filed:
Nov. 01, 1994
Hiroyuki Tajiri, Kitakatsuragi-gun, JP;
Yoshiteru Nakagawa, Yamatokoriyama, JP;
Yoshiaki Iwaya, Yasu-gun, JP;
Yoshiharu Tanaka, Uji, JP;
Keiichi Asami, Kyoto, JP;
Katsuyuki Touma, Kitakatsuragi-gun, JP;
Shinji Okumura, Yahata, JP;
Osaka Gas Company Ltd., Osaka-fu, JP;
Unitika Limited, Hyogo-ken, JP;
Abstract
A slurry containing a precursor fiber convertible to carbon fiber and/or a carbon fiber and, based on 100 parts by weight of the fiber, 10 to 300 parts by weight of a thermosetting resin, e.g. phenol resin, is processed into a random web. This web may contain a pitch or an organic granular material. The web is hot-pressed between a pair of belts while curing of the resin is inhibited to prepare a prepreg sheet. This sheet is disposed, leaving a clearance, in a mold having ribs on a molding surface and heated over the melting point of the resin for expansion and complete cure to provide a porous composite sheet equipped with grooves. This porous composite sheet is carbonized or graphitized to produce a porous carbonaceous material for use as a fuel cell electrode material and so on. This porous carbonaceous material has high homogeneity, gas permeability, electrical conductivity, heat conductivity and mechanical strength.