Patent US3174879A successfully refreshed from Google Patents.
US3174879A
Expired / Lapsed
US
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Sealed electric accumulator
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1962-11-19
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Granted: 1965-03-23
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Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 Stanimirovitch Douchan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:39
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/80; H01M4/801; H01M10/00; H01M10/24; H01M10/30; H01M10/42; H01M2010/4292; H01M4/36; H01M4/38; H01M4/44; H01M4/48; H01M4/52; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A SEALED STORAGE CELL COMPRISING A CONTAINER, A SINTERED NICKEL NEGATIVE ELECTRODE CONTINING CADMIUM HYDROXIDE AS ITS ACTIVE MATERIAL, A SINTERED NICKEL POSITIVE ELECTRODE OPPOSED THERETO CONTAINING NICKEL HYDROXIDE AS ITS ACTIVE MATERIAL, SAID NEGATIVE ELECTRODE HAVING A GREATER CAPACITY THAN SAID POSITIVE ELECTRODE, A POROUS SEPARATOR BETWEEN SAID ELECTRODES, AN ALKALINE ELECTROLYTE IN SAID SEPARATOR, SAID ELECTRODES BEING NO GREATER THAN ABOUT 1 MM. IN THICKNESS AND NO MORE THAN ABOUT 0.2 MM. APART, SAID POSITIVE ELECTRODE HAVING AT ALL TIMES MORE ELECTROCHEMICALLY EQUIVALENT MASS IN THE CHARGED STATE THAN SAID NEGATIVE ELECTRODE, WHEREBY IN THE SEALED CELL SUBSTANTIALLY NO HYDROGEN IS DEVELOPED DURING REVERSAL OR OVERCHARGE AND THE OXYGEN DEVELOPED DURING REVERSAL AND OVERCHARGE IS CONSUMED AND DURING REVERSAL A VOLTAGE PLATEAU IS EXHIBITED BETWEEN ABOUT -.6 AND -.8 VOLT.
Claim 2
Dependent Claim
132 words
A SEALED STORAGE CELL COMPRISING A CONTAINER, A SINTERED NICKEL NEGATIVE ELECTRODE CONTINING CADMIUM HYDROXIDE AS ITS ACTIVE MATERIAL, A SINTERED NICKEL POSITIVE ELECTRODE OPPOSED THERETO CONTAINING NICKEL HYDROXIDE AS ITS ACTIVE MATERIAL, SAID NEGATIVE ELECTRODE HAVING A GREATER CAPACITY THAN SAID POSITIVE ELECTRODE, A POROUS SEPARATOR BETWEEN SAID ELECTRODES, AN ALKALINE ELECTROLYTE IN SAID SEPARATOR, SAID ELECTRODES BEING NO GREATER THAN ABOUT 1 MM. IN THICKNESS AND NO MORE THAN ABOUT 0.2 MM. APART, SAID POSITIVE ELECTRODE HAVING AT ALL TIMES MORE ELECTROCHEMICALLY EQUIVALENT MASS IN THE CHARGED STATE THAN SAID NEGATIVE ELECTRODE, WHEREBY IN THE SEALED CELL SUBSTANTIALLY NO HYDROGEN IS DEVELOPED DURING REVERSAL OR OVERCHARGE AND THE OXYGEN DEVELOPED DURING REVERSAL AND OVERCHARGE IS CONSUMED AND DURING REVERSAL A VOLTAGE PLATEAU IS EXHIBITED BETWEEN ABOUT -.6 AND -.8 VOLT.
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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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |