US3576730A
Expired / Lapsed
US
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Nickel/nickel oxide reference electrodes for oxygen partial preddure measurements
Assignee: General Electric Co
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Filing: 1968-04-19
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Granted: 1971-04-27
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Expires: 1988-04-19
Abstract
Abstract A HIGH TEMPERATURE OXYGEN SENSING CELL WITH MEANS FOR PRODUCING A PARTIAL PRESSURE OF OXYGEN AS A REFERENCE. A MIXTURE COMPOSED OF NICKEL, NICKEL OXIDE AND AN ANTISINTERING MATERIAL IS COMPACTED IN A TUBE FORMED OF A SOLID OXYGEN-ION ELECTROLYTE. WHEN THE RESULTING CELL IS SEALED TO PREVENT SUBSTANTIAL QUANTITIES OF ENVIRONMENTAL OXYGEN FROM REACHING THE MIXTURE, A STABLE PARTIAL PRESSURE OF OXYGEN, DEPENDENT UPON TEMPERATURE, IS PRODUCED WITHIN THE TUBE.
Inventors
- 👤 Henry S Spacil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; G01N27/4076; G01N27/4067
Claims Analysis
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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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |