Patent US3342639A successfully refreshed from Google Patents.
US3342639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed alkaline cells and electrolytes therefor
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
•
Filing: 1964-07-07
•
Granted: 1967-09-19
•
Expires: 1984-07-07
Abstract
No abstract record available.
Inventors
- 👤 Harivel Jean-Pierre L Rodolphe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:08
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; H01M10/42; H01M10/4235; H01M2300/00; H01M2300/0002; H01M2300/0014; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/52; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A SECONDARY NICKEL-CADMIUM ALKALINE STORAGE CELL COMPRISING A SEALED CONTAINER, A POSITIVE ELECTRODE, A NEGATIVE ELECTRODE, AND A POROUS SEPARATOR SEPARATING SAID ELECTRODES, THE DISTANCE BETWEEN SAID ELECTRODES BEING IN THE RANGE OF ABOUT 0.1 TO 0.3 MM., THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING AN ALKALI METAL HYDROXIDE ELECTROLYTE HAVING AT AMBIENT TEMPERATURE CONCENTRATION OF FROM AT LEAST 11 N TO THE LIMIT OF SOLUBILITY IN WATER THEREOF AND CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ZINC HYDROXIDE AND CADMIUM HYDROXIDE IN A CONCENTRATION SUFFICIENT TO OBTAIN AN ELECTRO-DEPOSITED METAL LAYER ON THE CATHODE FOR CATALYZING THE DISSOLUTION OF ELECTROLYSIS PRODUCTS FORMED DURING OVERCHARGE AND OVERDISCHARGE WITHOUT CAUSING PRECIPITATION OF CONDUCTIVE CRYSTALS CAPABLE OF SHORT-CIRCUITIN THE CELL.
Claim 2
Dependent Claim
120 words
IN A SECONDARY NICKEL-CADMIUM ALKALINE STORAGE CELL COMPRISING A SEALED CONTAINER, A POSITIVE ELECTRODE, A NEGATIVE ELECTRODE, AND A POROUS SEPARATOR SEPARATING SAID ELECTRODES, THE DISTANCE BETWEEN SAID ELECTRODES BEING IN THE RANGE OF ABOUT 0.1 TO 0.3 MM., THE IMPROVEMENT IN COMBINATION THEREWITH COMPRISING AN ALKALI METAL HYDROXIDE ELECTROLYTE HAVING AT AMBIENT TEMPERATURE CONCENTRATION OF FROM AT LEAST 11 N TO THE LIMIT OF SOLUBILITY IN WATER THEREOF AND CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ZINC HYDROXIDE AND CADMIUM HYDROXIDE IN A CONCENTRATION SUFFICIENT TO OBTAIN AN ELECTRO-DEPOSITED METAL LAYER ON THE CATHODE FOR CATALYZING THE DISSOLUTION OF ELECTROLYSIS PRODUCTS FORMED DURING OVERCHARGE AND OVERDISCHARGE WITHOUT CAUSING PRECIPITATION OF CONDUCTIVE CRYSTALS CAPABLE OF SHORT-CIRCUITIN THE CELL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |