Patent US3179871A successfully refreshed from Google Patents.
US3179871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery charging circuit
Assignee: Specialties Development Corp
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Filing: 1961-02-01
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Granted: 1965-04-20
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Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel M Bagno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:58
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A BATTERY CHARGING NETWORK COMPRISING A SOURCE OF UNIDIRECTIONAL CHARGING CURRENT, SWITCH MEANS HAVING AN OPEN AND A CLOSED CONDITION FOR OPENING AND CLOSING A CURRENT PATH BETWEEN SAID SOURCE AND THE BATTERY TO BE CHARGED, MEANS ADAPTED TO BE CONNECTED TO SAID BATTERY FOR PRODUCING A VOLTAGE RELATED TO THE VOLTAGE OF SAID BATTERY, MEANS FOR COMPARING SAID VOLTAGE TO A VOLTAGE REFERENCE AND PRODUCING A CONTROL VOLTAGE EQUAL TO THE DIFFERENCE THEREBETWEEN, AND MEANS RESPONSIVE TO SAID CONTROL VOLTAGE FOR OPERATING SAID ELECTRONIC SWITCH TO ALTERNATELY PLACE SAID SWITCH IN THE OPEN CONDITION FOR A PERIOD WHICH INCREASES WITH INCREASES OF SAID CONTROL VOLTAGE AND IN THE CLOSED CONDITION FOR A PERIOD WHICH DECREASES WITH INCREASES IN SAID CONTROL VOLTAGE.
Claim 2
Dependent Claim
122 words
A BATTERY CHARGING NETWORK COMPRISING A SOURCE OF UNIDIRECTIONAL CHARGING CURRENT, SWITCH MEANS HAVING AN OPEN AND A CLOSED CONDITION FOR OPENING AND CLOSING A CURRENT PATH BETWEEN SAID SOURCE AND THE BATTERY TO BE CHARGED, MEANS ADAPTED TO BE CONNECTED TO SAID BATTERY FOR PRODUCING A VOLTAGE RELATED TO THE VOLTAGE OF SAID BATTERY, MEANS FOR COMPARING SAID VOLTAGE TO A VOLTAGE REFERENCE AND PRODUCING A CONTROL VOLTAGE EQUAL TO THE DIFFERENCE THEREBETWEEN, AND MEANS RESPONSIVE TO SAID CONTROL VOLTAGE FOR OPERATING SAID ELECTRONIC SWITCH TO ALTERNATELY PLACE SAID SWITCH IN THE OPEN CONDITION FOR A PERIOD WHICH INCREASES WITH INCREASES OF SAID CONTROL VOLTAGE AND IN THE CLOSED CONDITION FOR A PERIOD WHICH DECREASES WITH INCREASES IN SAID CONTROL VOLTAGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |