Patent US3258672A successfully refreshed from Google Patents.
US3258672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery chargers
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:38
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/60; H02J7/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A BATTERY CHARGER, THE COMBINATION OF A CHARGING CIRCUIT INCLUDING A PAIR OF CHARGING LEADS EACH PROVIDED WITH A CONNECTOR FOR CONNECTION TO A TERMINAL OF THE BATTERY TO BE CHARGED; A CONTACTOR COMPRISING CONTACTS CONNECTED IN SAID CHARGING CIRCUIT TO SELECTIVELY INTERRUPT AND COMPLETE THE SAME, AND AN ACTUATING WINDING FOR ACTUATING SAID CONTACTS WHEN ENERGIZED; A TRANSISTOR; FIRST CIRCUIT MEANS CONNECTED TO SAID CHARGING CIRCUIT TO RECEIVE CURRENT THEREFROM AND INCLUDING SAID TRANSISTOR AND SAID WINDING INTERCONNECTED FOR ENERGIZATION OF SAID WINDING BY CURRENT FROM SAID CHARGING CIRCUIT WHEN SAID TRANSISTOR IS IN A PREDETERMINED OPERATIVE STATE; AND SECOND CIRCUIT MEANS OPERATIVELY CONNECTED TO AT LEAST ONE OF SAID CONNECTORS AND TO SAID TRANSISTOR CONTROL THE OPERATIVE STATE OF SAID TRANSISTOR IN ACCORDANCE WITH THE POLARITY OF THE BATTERY POTENTIAL AT SAID CONNECTORS.
Claim 2
Dependent Claim
136 words
IN A BATTERY CHARGER, THE COMBINATION OF A CHARGING CIRCUIT INCLUDING A PAIR OF CHARGING LEADS EACH PROVIDED WITH A CONNECTOR FOR CONNECTION TO A TERMINAL OF THE BATTERY TO BE CHARGED; A CONTACTOR COMPRISING CONTACTS CONNECTED IN SAID CHARGING CIRCUIT TO SELECTIVELY INTERRUPT AND COMPLETE THE SAME, AND AN ACTUATING WINDING FOR ACTUATING SAID CONTACTS WHEN ENERGIZED; A TRANSISTOR; FIRST CIRCUIT MEANS CONNECTED TO SAID CHARGING CIRCUIT TO RECEIVE CURRENT THEREFROM AND INCLUDING SAID TRANSISTOR AND SAID WINDING INTERCONNECTED FOR ENERGIZATION OF SAID WINDING BY CURRENT FROM SAID CHARGING CIRCUIT WHEN SAID TRANSISTOR IS IN A PREDETERMINED OPERATIVE STATE; AND SECOND CIRCUIT MEANS OPERATIVELY CONNECTED TO AT LEAST ONE OF SAID CONNECTORS AND TO SAID TRANSISTOR CONTROL THE OPERATIVE STATE OF SAID TRANSISTOR IN ACCORDANCE WITH THE POLARITY OF THE BATTERY POTENTIAL AT SAID CONNECTORS.
References Cited (Backward Citations)
US2766418A
Cited
US2885623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |