Oxygen sensor and electrode device therefor
Abstract
Abstract AN OXYGEN SENSOR IS DESCRIBED WHICH HAS AN ELECTRODE DEVICE WITH A FIRST ELECTRODE AND A REFERENCE ELECTRODE, AND AN AQUEOUS BUFFERED SOLUTION OF AN ELECTROLYTE CONTAINING A HALIDE SALT WHICH CONTACTS THE NOBLE METAL PORTION OF THE FIRST ELECTRODE AND THE SILVER HALIDE LAYER OF THE REFERENCE ELECTRODE OF THE ELECTRODE DEVICE. THE ELECTRODE DEVICE HAS A CHEMICALLY-BIASED OXYGENSENSING ELECTRODE WITH A CLOSED-END TUBE, THE TUBE HAVING A PORTION OF A NOBLE METAL SELECTED FROM THE CLASS CONSISTING OF PALLADIUM AND PALLADIUM ALLOYS, A RESERVOIR FOR HYDROGEN CONNECTED TO THE OPPOSITE END OF THE TUBE, AND A HYDROGEN GAS SOURCE CONTAINED WITHIN AT LEAST THE RESERVOIR; A LAYER OF ELECTRICAL INSULATION COVERING AT LEAST PARTIALLY THE TUBE LEAVING THE NOBLE METAL PORTION AT LEAST PARTIALLY EXPOSED, AND A REFERENCE ELECTRODE INSULATED ELECTRICALLY FROM THE NOBLE METAL PORTION, THE REFERENCE ELECTRODE CONSISTING OF SILVER WITH AT LEAST A PARTIAL LAYER OF SILVER HALIDE THEREON.
Inventors
- 👤 W Grubb
- 👤 L King
Bibliographic Details
Claims Analysis
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |