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US3379953A
Expired / Lapsed
US
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Automatic battery charging systems
Assignee: Alkaline Batteries Ltd
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Filing: 1965-05-12
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Granted: 1968-04-23
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Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Field Braham Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:44
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/92; H02J7/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2510141A
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US2334289A
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US3176210A
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US3178629A
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US3241029A
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US3302091A
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US3321690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |