Patent US3481790A successfully refreshed from Google Patents.
US3481790A
Expired / Lapsed
US
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Seawater reserve battery having magnesium anode and lead dioxide-graphite fabric cathode
Assignee: ESB Inc
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Filing: 1967-08-29
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Granted: 1969-12-02
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Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Duddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32; H01M6/34; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; H01M4/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2492206A
Cited
US2612534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |