US3558358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-zinc secondary battery
Assignee: Eagle Picher Industries Inc
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Filing: 1969-03-10
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Granted: 1971-01-26
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Expires: 1989-03-10
Abstract
Abstract A SECONDARY BATTERY INCLUDING POSITIVE ELECTRODES COMPRISING NICKEL AND NEGATIVE ELECTRODES COMPRISING ZINC IMMERSED IN A CAUSTIC ELECTROLYTE, THE NEGATIVE ZINC ELECTRODE BEING ENCLOSED IN AN ELECTRODE WRAPPER FABRICATED OF POLYVINYL ALCOHOL WHICH IS IMPERMEABLE TO ZINCATE IONS WHILE BEING PERMEABLE TO HYDROXYL IONS AS IS NECESSARY TO SUSTAIN IONIC CONDUCTION INVOLVED IN ELECTRO-CHEMICAL BAT TERY ACTION.
Inventors
- 👤 Chester A Ropp Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:15
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/24; H01M10/30; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/429; H01M50/4295; H01M50/44; H01M2300/00; H01M2300/0002; H01M2300/0014; 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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |