Patent US2429546A successfully refreshed from Google Patents.
US2390574A
Expired / Lapsed
US
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Primary battery
Assignee: Thomas A Edison Inc
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Filing: 1944-03-22
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Granted: 1945-12-11
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Expires: 1964-03-22
Abstract
No abstract record available.
Inventors
- 👤 Le Roy S Dunham
- 👤 Hubert M Teague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:50
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/50; H01M6/5077; H01M50/00; H01M50/20; H01M50/256; H01M50/50; H01M50/543; H01M50/552; H01M50/564; H01M50/567; H01M4/00; H01M4/02; H01M2004/024
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) | 1948-12-10 | 1949-06-11 | 1949-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-12-10 | 1953-06-11 | 1953-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-12-10 | 1957-06-11 | 1957-12-11 | $7700.00 | Window Closed / Lapsed |