Patent US3564382A successfully refreshed from Google Patents.
US3564382A
Expired / Lapsed
US
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Coulometer controlled battery chargers
Assignee: Department of National Defence
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Filing: 1968-09-13
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Granted: 1971-02-16
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Expires: 1988-09-13
Abstract
Abstract BATTERY CHARGING CIRCUITS USING A COULOMETER IN SERIES WITH THE BATTERY TO SENSE THE AMOUNT OF CHARGE GOING INTO OR OUT OF THE BATTERY. THE COULOMETER PROVIDES AN ABRUPT RISE IN VOLTAGE UPON PASSAGE OF A PREDETERMINED NET AMOUNT OF CHARGE THERETHROUGH, E.G. WHEN THE BATTERY HAS BEEN FULLY CHARGED. THIS VOLTAGE ACTUATES MEANS TO TERMINATE FURTHER CHARGING EITHER BY TRIPPING A RELAY OR DEACTIVATING A UNIJUNCTION OSCILLATOR WHICH NORMALLY PROVIDES GATING PULSES TO AN SCR IN SERIES WITH THE BATTERY AND COULOMETER. MEANS ARE PROVIDED FOR CAUSING A TIMED OVERCHARGE OR AN INTERMITTENT PULSE TYPE OF OVERCHARGE.
Inventors
- 👤 Thomas Elston King
- 👤 Ronald Lloyd Haines
- 👤 Howard Robert Braun
- 👤 Ronald Denis Ouellette
- 👤 Jack Rodney Mckague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:33
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/94; Y; Y10; Y10S; Y10S320/00; Y10S320/18; Y10S320/19
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |