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US4908118A
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Sensor for monitoring hydrogen concentration in gases
Assignee: Battelle-Institut
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Filing: 1987-11-23
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Granted: 1990-03-13
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Expires: 2007-11-23
Abstract
Abstract A sensor for monitoring hydrogen concentrations in gases, containing a solid electrolyte body, a detector electrode having a surface which is exposable to a gas to be monitored, and a reference electrode, in which the reference and detector electrodes make contact with the solid electrolyte, and the detector electrode contains a platinum metal or a platinum metal oxide.
Inventors
- 👤 Sonya Ammende
- 👤 Hartmut Erdmann
- 👤 Heinz-Werner Etzkorn
- 👤 Klaus Zucholl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:30
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4073; G01N27/4074
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
A sensor for monitoring hydrogen concentrations in gases, comprising: a solid electrolyte body comprising at least one of nasicon, titsicon, khibinskite, wadeite and β-Al 2 O 3 ; a detector electrode having a surface to be exposed to a gas to be monitored; and a reference electrode comprising sodium tungsten bronze; wherein said reference electrode and said detector electrode both make contact with said solid electrolyte, said detector electrode comprises platinum, or palladium or palladium oxide, and said detector electrode generates an electromotive force when hydrogen reacts with said detector electrode.
Claim 2
Dependent Claim
91 words
A sensor for monitoring hydrogen concentrations in gases, comprising: a solid electrolyte body comprising at least one of nasicon, titsicon, khibinskite, wadeite and β-Al 2 O 3 ; a detector electrode having a surface to be exposed to a gas to be monitored; and a reference electrode comprising sodium tungsten bronze; wherein said reference electrode and said detector electrode both make contact with said solid electrolyte, said detector electrode comprises platinum, or palladium or palladium oxide, and said detector electrode generates an electromotive force when hydrogen reacts with said detector electrode.
Claim 3
Dependent Claim
35 words
A sensor as defined in claim 1, further comprising a cover sealing the reference electrode and at least part of the solid electrolyte and exposing at least part of the surface of the detector electrode.
Claim 4
Dependent Claim
17 words
A sensor as defined in claim 1, wherein the sodium tungsten bronze exhibits stable sodium ion activity.
Claim 5
Dependent Claim
13 words
A sensor as defined in claim 1, wherein said electrolyte body comprises nasicon.
Claim 6
Dependent Claim
13 words
A sensor as defined in claim 1, wherein said electrolyte body comprises titsicon.
Claim 7
Dependent Claim
13 words
A sensor as defined in claim 1, wherein said electrolyte body comprises khibinskite.
Claim 8
Dependent Claim
13 words
A sensor as defined in claim 1, wherein said electrolyte body comprises wadeite.
Claim 9
Dependent Claim
17 words
A sensor as defined in claim 1, wherein said electrolyte body comprises β-Al 2 O 3 .
References Cited (Backward Citations)
US3475223A
Cited
US3825482A
Cited
US3843400A
Cited
US4166009A
Cited
US4111777A
Cited
US4024036A
Cited
US4049891A
Cited
US4272350A
Cited
US4377460A
Cited
US4689122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-12 | 1993-09-11 | 1994-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-12 | 1997-09-11 | 1998-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-12 | 2001-09-11 | 2002-03-13 | $7700.00 | Window Closed / Lapsed |