Patent US4998980A successfully refreshed from Google Patents.
Patent US3083572A successfully refreshed from Google Patents.
US3083572A
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Fluid level systems
Assignee: Honeywell Inc
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Filing: 1958-07-25
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Granted: 1963-04-02
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Expires: 1978-07-25
Abstract
No abstract record available.
Inventors
- 👤 Robert P Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:46
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/263; G01F23/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
APPARATUS OF THE CLASS DESCRIBED COMPRISING, IN COMBINATION: REBALANCE CAPACITANCE TYPE FLUID QUANTITY INDICATING CIRCUITRY OPERABLE TO PRODUCE ELECTRICAL SIGNALS UPON CHANGE IN FLUID QUANTITY THE SIGNALS HAVING A MAGNITUDE WHICH VARIES WITH THE TEMPERATURE OF THE FLUID; VOLTAGE RESPONSIVE MEANS HAVING FIRST AND SECOND INPUT TERMINALS; CONDUCTIVE MEANS CONNECTING A FIRST INPUT TERMINAL OF SAID VOLTAGE RESPONSIVE MEANS TO SAID FLUID QUANTITY INDICATING CIRCUITRY; AND NEGATIVE TEMPERATURE COEFFICIENT RESISTOR MEANS MOUNTED IN THE FLUID AND CONNECTED ACROSS THE INPUT TERMINALS OF SAID VOLTAGE RESPONSIVE MEANS TO BYPASS VARIOUS PORTIONS OF THE ELECTRICAL SIGNALS IN ACCORDANCE WITH THE TEMPERATURE OF THE FLUID.
Claim 2
Dependent Claim
102 words
APPARATUS OF THE CLASS DESCRIBED COMPRISING, IN COMBINATION: REBALANCE CAPACITANCE TYPE FLUID QUANTITY INDICATING CIRCUITRY OPERABLE TO PRODUCE ELECTRICAL SIGNALS UPON CHANGE IN FLUID QUANTITY THE SIGNALS HAVING A MAGNITUDE WHICH VARIES WITH THE TEMPERATURE OF THE FLUID; VOLTAGE RESPONSIVE MEANS HAVING FIRST AND SECOND INPUT TERMINALS; CONDUCTIVE MEANS CONNECTING A FIRST INPUT TERMINAL OF SAID VOLTAGE RESPONSIVE MEANS TO SAID FLUID QUANTITY INDICATING CIRCUITRY; AND NEGATIVE TEMPERATURE COEFFICIENT RESISTOR MEANS MOUNTED IN THE FLUID AND CONNECTED ACROSS THE INPUT TERMINALS OF SAID VOLTAGE RESPONSIVE MEANS TO BYPASS VARIOUS PORTIONS OF THE ELECTRICAL SIGNALS IN ACCORDANCE WITH THE TEMPERATURE OF THE FLUID.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |