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:
May. 28, 2019
Filed:
Dec. 10, 2014
Toray Industries, Inc., Tokyo, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
An object of the present invention is to provide a carbon fiber nonwoven fabric which has excellent electrical conductivity and thermal conductivity as an electrode base material for a polymer electrolyte fuel cell and which is useful as a base material excellent in gas diffusibility and drainage performance. The present invention provides a carbon fiber nonwoven fabric on a surface of which a plurality of non-through pores each having an opening area larger than the average pore area of the carbon fiber nonwoven fabric are dispersively formed, the carbon fiber nonwoven fabric having no broken fibers observed on the peripheral edge portions of the non-through pores in plane view.