US3125718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coefficient
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
•
Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:17
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/36; G01R31/3644; G01R31/3646
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A CIRCUIT FOR INDICATING THE CONDITION OF A STORAGE BATTERY WHICH PROVIDES CURRENT TO A LOAD CONNECTED THERETO INCLUDING IN COMBINATION, A METER INCLUDING FIRST AND SECOND SENSING COILS, A ZENER DIODE AND A RESISTOR CONNECTED IN SERIES WITH SAID FIRST COIL ACROSS THE STORAGE BATTERY, SAID RESISTOR HAVING A NEGATIVE TEMPERATURE COEFFICIENT TO COMPENSATE FOR VARIATION OF THE ZENER DIODE VOLTAGE WITH TEMPERATURE, AND A SECOND RESISTOR SERIES CONNECTED BETWEEN THE BATTERY AND THE LOAD, SAID SECOND COIL OF SAID METER BEING CONNECTED ACROSS SAID SECOND RESISTOR TO COMPENSATE THE METER INDICATION FOR THE CURRENT FLOW FROM THE BATTERY.
Claim 2
Dependent Claim
100 words
A CIRCUIT FOR INDICATING THE CONDITION OF A STORAGE BATTERY WHICH PROVIDES CURRENT TO A LOAD CONNECTED THERETO INCLUDING IN COMBINATION, A METER INCLUDING FIRST AND SECOND SENSING COILS, A ZENER DIODE AND A RESISTOR CONNECTED IN SERIES WITH SAID FIRST COIL ACROSS THE STORAGE BATTERY, SAID RESISTOR HAVING A NEGATIVE TEMPERATURE COEFFICIENT TO COMPENSATE FOR VARIATION OF THE ZENER DIODE VOLTAGE WITH TEMPERATURE, AND A SECOND RESISTOR SERIES CONNECTED BETWEEN THE BATTERY AND THE LOAD, SAID SECOND COIL OF SAID METER BEING CONNECTED ACROSS SAID SECOND RESISTOR TO COMPENSATE THE METER INDICATION FOR THE CURRENT FLOW FROM THE BATTERY.
References Cited (Backward Citations)
US2779442A
Cited
US2763820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |