US3343152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery level indicator
Assignee: American Radiator and Standard Sanitary Corp
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Filing: 1966-01-21
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Granted: 1967-09-19
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Expires: 1986-01-21
Abstract
No abstract record available.
Inventors
- 👤 Atlee S Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:36
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/241; G01F23/243; H; H01; H01M; H01M10/00; H01M10/42; H01M10/48; H01M10/484; H01M50/00; H01M50/50; H01M50/569; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
LIQUID LEVEL INDICATOR MEANS FOR A MULTI-CELL BATTERY COMPRISING AN ELECTRICALLY CONDUCTIVE PROBE FOR EACH CELL, EACH PROBE TERMINATING WITHIN THE CELL APPROXIMATELY AT THE LOWEST SAFE OPERATING ELECTROLYTE LEVEL; SAID PROBES BEING DIVIDED INTO FIRST AND SECOND GROUPS, THE FIRST GROUP BEING ASSOCIATED WITH ELECTROLYTE WHICH IS MORE NEGATIVE THAN THAT OF THE SECOND GROUP; A SOURCE OF POSITIVE VOLTAGE; A FIRST GROUP OF PNP TRANSISTORS HAVING THEIR RESPECTIVE BASES CONNECTED TO RESPECTIVE PROBES IN THE FIRST GROUP, AND THEIR EMITTER-COLLECTOR CIRCUITS IN A SERIES CIRCUIT INITIATING AT THE SOURCE OF POSITIVE VOLTAGE; A SIGNAL TRANSISTOR HAVING ITS EMITTER-COLLECTOR CIRCUIT CONNECTED WITH THE AFOREMENTIONED SERIES CIRCUIT; A SECOND GROUP OF NPN TRANSISTORS HAVING THEIR RESPECTIVE BASES CONNECTED TO RESPECTIVE PROBES IN THE SECOND GROUP, AND THEIR COLLECTOR-
Claim 2
Dependent Claim
128 words
LIQUID LEVEL INDICATOR MEANS FOR A MULTI-CELL BATTERY COMPRISING AN ELECTRICALLY CONDUCTIVE PROBE FOR EACH CELL, EACH PROBE TERMINATING WITHIN THE CELL APPROXIMATELY AT THE LOWEST SAFE OPERATING ELECTROLYTE LEVEL; SAID PROBES BEING DIVIDED INTO FIRST AND SECOND GROUPS, THE FIRST GROUP BEING ASSOCIATED WITH ELECTROLYTE WHICH IS MORE NEGATIVE THAN THAT OF THE SECOND GROUP; A SOURCE OF POSITIVE VOLTAGE; A FIRST GROUP OF PNP TRANSISTORS HAVING THEIR RESPECTIVE BASES CONNECTED TO RESPECTIVE PROBES IN THE FIRST GROUP, AND THEIR EMITTER-COLLECTOR CIRCUITS IN A SERIES CIRCUIT INITIATING AT THE SOURCE OF POSITIVE VOLTAGE; A SIGNAL TRANSISTOR HAVING ITS EMITTER-COLLECTOR CIRCUIT CONNECTED WITH THE AFOREMENTIONED SERIES CIRCUIT; A SECOND GROUP OF NPN TRANSISTORS HAVING THEIR RESPECTIVE BASES CONNECTED TO RESPECTIVE PROBES IN THE SECOND GROUP, AND THEIR COLLECTOR-
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |