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. 20, 2004
Filed:
Nov. 08, 2002
Norihiko Nadanami, Aichi, JP;
Shoji Kitanoya, Aichi, JP;
Tomonori Kondo, Aichi, JP;
Masaya Watanabe, Aichi, JP;
Noboru Ishida, Gifu, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A gas sensor suitable for measuring hydrogen concentration, including a proton conductive layer ( ); a first electrode ( ) and a second electrode ( ) provided on the proton conductive layer ( ); a gas diffusion-limiting inlet ( ) provided between the first electrode ( ) and a measurement gas atmosphere ( ) containing hydrogen gas; and a gas diffusion-limiting outlet ( ) provided between the second electrode ( ) and the atmosphere ( ); wherein the ratio (a/b) between the diffusion resistance (a) of the diffusion limiting portion ( ) and the diffusion resistance (b) of the gas outlet portion ( ) is not greater than