US3553562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charging circuit
Assignee: WOODBRO CORP
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Filing: 1968-12-12
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Granted: 1971-01-05
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Expires: 1988-12-12
Abstract
Abstract A CIRCUIT FOR CHARGING A BATTERY IS DISCLOSED WHICH PROVIDES AN INDICATION OF THE CAPACITY F THE BATTERY, THE STATE OF THE CHARGE OF THE BATTERY, THE LOSS OF THE BATTERY FROM THE CIRCUIT, AND THE PRESENCE OF CHARGING POWER. THE CIRCUIT RECHARGES THE BATTERY WHEN THE BATTERY TERMINAL VOLTAGE REACHES A PREDETERMINED LEVEL. THERE IS NO CONTINUOUS TRICKLE CHARGE REQUIRED OR NECESSARILY APPLIED TO THE BATTERY.
Inventors
- 👤 Leroy R Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:58
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/96; Y; Y10; Y10S; Y10S320/00; Y10S320/12; Y10S320/18; Y10S320/21
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |