US2474716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salt-water battery
Assignee: Submarine Signal Co
•
Filing: 1944-09-18
•
Granted: 1949-06-28
•
Expires: 1964-09-18
Abstract
No abstract record available.
Inventors
- 👤 John T Beechlyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:15
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32; H01M6/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1807595A
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US944079A
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US1116893A
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US1331089A
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US1522121A
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US1560798A
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US1851481A
Cited
GB392208A
Cited
US2177235A
Cited
US2115744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |