US2746480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the measurement and control of fluids
Assignee: Individual
•
Filing: 1953-05-15
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Granted: 1956-05-22
•
Expires: 1973-05-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Hildyard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:29
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/66; G01F1/667; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013; Y; Y10; Y10S; Y10S367/00; Y10S367/908; Y10T; Y10T137/00; Y10T137/7287
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
IN AN APPARATUS OF THE NATURE DESCRIBED, A VESSEL FOR FLUID, ADJUSTABLE VALVE MEANS FOR VARYING THE FLUID IN SAID VESSEL, AN ELECTROMECHANICAL TRANSDUCER LOCATED IN SAID VESSEL BELOW THE NORMAL FLUID LEVEL THEREIN, ANOTHER ELECTROMECHANICAL TRANSDUCER LOCATED ABOVE THE NORMAL FLUID LEVEL IN SAID VESSEL, AN OSCILLATOR, MEANS CONNECTING SAID OSCILLATOR TO ONE OF SAID TRANSDUCERS FOR DRIVING THE SAME AT A PREDETERMINED HIGH FREQUENCY, MEANS CONNECTING THE OTHER TRANSDUCER TO SAID OSCILLATOR FOR VARYING THE FREQUENCY OF THE OUTPUT THEREOF, AND MEANS RESPONSIVE TO VARIATIONS IN THE FREQUENCY OF THE OUTPUT OF THE OSCILLATOR FOR ADJUSTING SAID VALVE MEANS.
References Cited (Backward Citations)
US2277037A
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US2283750A
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GB574819A
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US2523363A
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US2483821A
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US2472249A
Cited
GB623022A
Cited
US2669121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |