US3974054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring cell for determining oxygen concentrations in a gas mixture
Assignee: US Philips Corp
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Filing: 1974-12-12
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Granted: 1976-08-10
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Expires: 1994-12-12
Abstract
Abstract Measuring cell for determining oxygen concentrations in a gas mixture having a partition consisting of an electrolyte material such as ZrO 2 , which reversibly reacts with oxygen and is ion conductive. The measuring cell is characterized in that the partition closes a hollow body and projects therefrom so that the electrodes may be provided on the same side to reduce disturbing influences on the measurement.
Inventors
- 👤 Petrus Jacobus Poolman
- 👤 Nabil Ahmed Abdalla
- 👤 Arend Harrewijne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:20
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4071
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
135 words
A cell for measuring the ratio between oxygen concentrations of two gas mixtures, comprising: a hollow body for communicating one of the gas mixtures to an opening therein; a flat partition sheet closing said opening and projecting therebeyond so that a first area of one side of said sheet is exposed to the gas mixture inside said hollow body while outside of said hollow body a second area of said one side may be simultaneously exposed to another gas mixture, said flat sheet being electrolyte material which reversibly reacts with oxygen and is ion conductive; electrically separate gas permeable electrodes on said first and second areas respectively; and means for electrically contacting said electrodes to measure the voltage therebetween as a measure of the ratio between the oxygen concentrations to which said electrodes are exposed.
Claim 2
Dependent Claim
135 words
A cell for measuring the ratio between oxygen concentrations of two gas mixtures, comprising: a hollow body for communicating one of the gas mixtures to an opening therein; a flat partition sheet closing said opening and projecting therebeyond so that a first area of one side of said sheet is exposed to the gas mixture inside said hollow body while outside of said hollow body a second area of said one side may be simultaneously exposed to another gas mixture, said flat sheet being electrolyte material which reversibly reacts with oxygen and is ion conductive; electrically separate gas permeable electrodes on said first and second areas respectively; and means for electrically contacting said electrodes to measure the voltage therebetween as a measure of the ratio between the oxygen concentrations to which said electrodes are exposed.
Claim 3
Dependent Claim
14 words
A cell as defined in claim 1 wherein said hollow body is electrically insulative.
Claim 4
Dependent Claim
16 words
A cell as defined in claim 1 wherein said sheet consists essentially of stabilized zirconium oxide.
Claim 5
Dependent Claim
15 words
A cell as defined in claim 3 wherein said electrodes consist essentially of porous platinum.
Claim 6
Dependent Claim
16 words
A cell as defined in claim 3 wherein said hollow body consists essentially of aluminum oxide.
Claim 7
Dependent Claim
30 words
A cell as defined in claim 5 and further characterized by said hollow body and said sheet being bonded to each other around said opening via a glass ceramic material.
Claim 8
Dependent Claim
30 words
A cell as defined in claim 5 and further characterized by said hollow body and said sheet being thermocompression bonded to each other around said opening via a platinum ring.
Claim 9
Dependent Claim
12 words
A cell as defined in claim 1 wherein said electrodes are concentric.
References Cited (Backward Citations)
US3558280A
Cited
US3738341A
Cited
US3691023A
Cited
US3719564A
Cited
FR2173564A5
Cited
US3791953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |