US4789453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodes for the combined measurement of oxygen and carbon dioxide
Assignee: Kontron Instruments Holding NV
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Filing: 1988-01-25
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Granted: 1988-12-06
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Expires: 2008-01-25
Abstract
Abstract A combined sensor for sensing partial O 2 pressure and partial CO 2 pressure and comprising measuring electrodes, a reference electrode, a diaphragm covering the electrodes and an electrolyte layer between the electrodes and the diaphragm wherein the reference electrode has disposed around it a screening of gold which is at the same potential as the reference electrode and the electrolyte contains a defined concentration of a soluble silver compound or of a silver complex.
Inventors
- 👤 Patrick Eberhard
- 👤 Wolfgang Mindt
- 👤 Jean-Pierre Palma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:32
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
An electrode arrangement for the combined measurement of the partial O 2 and CO 2 pressures of a medium, the arrangement comprising measuring electrodes, one of which applies for PO 2 and the other applies for PCO 2 , a reference electrode, a diaphragm covering the electrodes and an electrolyte layer between the electrodes and the diaphragm, the reference electrode has disposed thereon a layer of gold which is at the same potential as the reference electrode and the electrolyte contains a predetermined concentration of a soluble silver compound or of a silver complex.
Claim 2
Dependent Claim
94 words
An electrode arrangement for the combined measurement of the partial O 2 and CO 2 pressures of a medium, the arrangement comprising measuring electrodes, one of which applies for PO 2 and the other applies for PCO 2 , a reference electrode, a diaphragm covering the electrodes and an electrolyte layer between the electrodes and the diaphragm, the reference electrode has disposed thereon a layer of gold which is at the same potential as the reference electrode and the electrolyte contains a predetermined concentration of a soluble silver compound or of a silver complex.
Claim 3
Dependent Claim
38 words
The electrode arrangement of claim 1, wherein the reference electrode has a circular surface with a diameter of at least about one-tenth and at most about one-third of the diameter of the total measuring area of the electrode.
Claim 4
Dependent Claim
24 words
The electrode arrangement of claim 1, wherein the soluble silver compound is selected from the group consisting of AgCl, AgCN, and AgNO 3 .
Claim 5
Dependent Claim
28 words
The electrode arrangement of claim 1, wherein the silver complex is formed by complexing silver with a complexing agent selected from the group consisting of EDTA and DTPA.
Claim 6
Dependent Claim
19 words
The electrode arrangement of claim 1, wherein the electrolyte contains about 10 to about 100×10 -6 mol/l of silver.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |