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:
Oct. 13, 2020
Filed:
Mar. 27, 2017
Toray Industries, Inc., Tokyo, JP;
Masamichi Utsunomiya, Otsu, JP;
Yasuaki Tanimura, Otsu, JP;
Toshiya Kamae, Ehime, JP;
Junichi Urai, Otsu, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
A gas diffusion electrode substrate has an electrically conductive porous substrate and a microporous layer-on one side of the electrically conductive porous substrate. The microporous layer-includes a dense portion A and a dense portion B. The dense portion A is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 20 nm to 39 nm. The dense portion A has a thickness of 30% to 100% with respect to the thickness of the microporous layer-as 100% and a width of 10 μm to 200 μm. The dense portion B is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 40 nm to 70 nm.