Patent US3558280A successfully refreshed from Google Patents.
US3558280A
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US
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Solid state oxygen gauge
Assignee: Westinghouse Electric Corp
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Filing: 1968-11-05
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Granted: 1971-01-26
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Expires: 1988-11-05
Abstract
Abstract AN OXYGEN GAUGE WHICH INCLUDES A SOLID STATE OXYGEN SENSITIVE ELEMENT IN THE FORM OF A MIXED VALENCE OXIDE COMPOUND THAT EXHIBITS A CHANGE IN ELECTRICAL RESISTANCE AS A FUNCTION OF THE CHANGE IN THE OXYGEN PARTIAL PRESSURE OF A SAMPLE GAS.
Inventors
- 👤 Armand J Panson
- 👤 Roswell J Ruka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:25
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/207497
Claims Analysis
Total Claims: 0
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |