Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
2007-10-02
2007-10-02
Olsen, Kaj K. (Department: 1753)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C204S425000, C204S426000
Reexamination Certificate
active
10628400
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 H2O and CO. In the hydrogen gas sensor, the flow sectional area of a diffusion-rate limiting portion6is rendered small; the electrode surfaces of first and second electrodes3and4are rendered large; and/or a solution containing a polymer electrolyte which may be identical to that of a proton-conductive layer2is applied onto the surfaces of the first and second electrodes3and4to thereby form a layer containing the polymer electrolyte. Thus, the rate of conduction of protons from the first electrode3to the second electrode4becomes greater than the rate at which protons are derived from hydrogen which is introduced onto the first electrode3via the diffusion-rate limiting portion6.
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Inoue Ryuji
Ishida Norobu
Kondo Tomonori
Nadanami Norihiko
Oshima Takafumi
NGK Spark Plug Co. Ltd.
Olsen Kaj K.
Sughrue & Mion, PLLC
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