US3556849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recharging alkaline/zinc cells
Assignee: Leesona Corp
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Filing: 1968-06-19
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Granted: 1971-01-19
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Expires: 1988-06-19
Abstract
Abstract AN IMPROVED METHOD OF RECHARGING A SECONDARY BATTERY UTILIZING A ZINC ANODE IS DESCRIBED COMPRISING MAINTAINING THE CURRENT DENSITY DURING CHARGING BETWEEN ABOUT 1 AND 15 MA./CM.2 AND PULSE CHARGIN I.E., CHARGING WITH A PERIODIC CUT-OFF OF CURRENT, WITH THE ON TIME BEING NO GREATER THAN ABOUT 150 MILLISECONDS AND THE OFF PERIOD BEING AT LEAST 0.5 OF THE ON PERIOD.
Inventors
- 👤 Harry G Oswin
- 👤 Keith F Blurton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:16
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/44; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |