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:
Nov. 25, 2003
Filed:
Nov. 21, 2000
Norihiko Nadanami, Aichi, JP;
Norobu Ishida, Gifu, JP;
Takafumi Oshima, Aichi, JP;
Ryuji Inoue, Gifu, JP;
Tomonori Kondo, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A hydrogen gas sensor capable of accurately measuring hydrogen concentration of a measurement gas atmosphere in the presence of a variety of interfering gasses such as H O and CO. In the hydrogen gas sensor, the flow sectional area of a diffusion-rate limiting portion is rendered small; the electrode surfaces of first and second electrodes and are rendered large; and/or a solution containing a polymer electrolyte which may be identical to that of a proton-conductive layer is applied onto the surfaces of the first and second electrodes and to thereby form a layer containing the polymer electrolyte. Thus, the rate of conduction of protons from the first electrode to the second electrode becomes greater than the rate at which protons are derived from hydrogen which is introduced onto the first electrode via the diffusion-rate limiting portion