US3756923A
Expired / Lapsed
US
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Method of determining so2 concentration
Assignee: Individual
•
Filing: 1970-11-30
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Granted: 1973-09-04
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Expires: 1990-11-30
Abstract
Abstract A MEASURING CELL FOR DETERMINING THE CONCENTRATION OF SO2 IN A FLUID. THE CELL INCLUDES AN ELECTRODE COVERED WITH A THIN LAYER OF AN ELECTROLYTE CONTAINING SILVER IONS, AND A COUTERELECTRODE. A VOLTAGE IS APPLIED ACROSS THE ELECTRODES AND THE RESULTING CURRENT IS A MEASURE OF THE CONCENTRATION OF SO2.
Inventors
- 👤 H Dahms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:42
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045; G01N27/416; G01N27/4163
Claims Analysis
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |