US3810828A
Expired / Lapsed
US
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Reference electrode
Assignee: Tudor AB
•
Filing: 1971-12-20
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Granted: 1974-05-14
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Expires: 1991-12-20
Abstract
Abstract A REFERENCE ELECTRODE USING CADMIUM METAL FOR MEASURING THE ELECTRODE POTENTIAL IN A LEAD-ACID CELL. THE ELECTRODE IS MOUNTED IN A CYLINDRICAL CASING WHICH HAS A POROUS PLUG AT ITS LOWER END. ELECTROLYTE IN THE CYLINDRICAL CASING RAPIDLY CONTACTS THE MEASUREMENT SOLUTION (BATTERY ELECTROLYTE) WHEN THE ELECTRODE HOUSING IS INSERTED THROUGH A FILL CAP OPENING IN THE CELL HOUSING.
Inventors
- 👤 A Lindholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:22
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/301
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |