US3776832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical detection cell
Assignee: Becton Dickinson and Co
•
Filing: 1970-11-10
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Granted: 1973-12-04
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Expires: 1990-11-10
Abstract
Abstract AN ELECTROCHEMICAL CELL COMPRISING AN ANODE, A CATHODE AND A REFERENCE ELECTRODE OPERATING IN AN AQUEOUS ELECTROLYTE IS UTILIZED FOR DETECTION OF NOXIOUS GASES IN AIR. THE GAS IS OXIDIZED AT THE ANODE AND DETECTION THEREOF OCCURS AS A RESULT OF THE CURRENT GENERATED BY THE REACTION. A FIXED POTENTIAL DIFFERENCE IS MAINTAINED BETWEEN THE ANODE AND THE REFERENCE ELECTRODE TO AVOID GENERATION OF UNDESIRED CURRENT FROM REACTIONS INVOLVING AN OXYGEN-WATER REDOX COUPLE WITHIN THE CELL WHICH WOULD INVALIDATE ANODE-CATHODE CURRENT FOR GAS DETECTION PURPOSES. THE FIXED POTENTIAL IS CHOSEN FROM WITHIN THE RANGE OF ABOUT 0.9 TO 1.5 VOLTS.
Inventors
- 👤 H Oswin
- 👤 K Blurton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:58
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |