US3177699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Volumetric flow meter calibrator
Assignee: North American Aviation Corp
•
Filing: 1959-11-05
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Granted: 1965-04-13
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Expires: 1979-11-05
Abstract
No abstract record available.
Inventors
- 👤 James J Lindquist
- 👤 Arve R Sjovold
- 👤 Verne R Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:03
CPC Classifications
G; G01; G01F; G01F25/00; G01F25/10; G01F25/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A SYSTEM FOR CALIBRATING A FLOW METER, THE COMBINATION OF MEANS FOR PROVIDING A STEADY DRIVING PRESSURE; TANK MEANS FOR SUPPLYING A QUANTITY OF LIQUID UNDER SAID DRIVING PRESSURE; A RETAINING VESSEL; MEANS FOR MAINTAINING FLOW AT A SELECTED NOMINAL RATE FROM SAID TANK MEANS INTO SAID RETAINING VESSEL THROUGH A FLOW METER TO BE CALIBRATED; MEANS OPERATIVELY ASSOCIATED WITH SAID RETAINING VESSEL FOR CONSTANTLY ASSURING A SUBSTANTIALLY SMOOTH LIQUID SURFACE; AND MEANS ACTUATED BY THE LIQUID SURFACE FOR DETERMINING AND RECORDING THE TIME FOR A KNOW VOLUME OF LIQUID TO BE FORCED INTO SAID RETAINING VESSEL AT THE SELECTED NOMINAL RATE.
Claim 2
Dependent Claim
103 words
IN A SYSTEM FOR CALIBRATING A FLOW METER, THE COMBINATION OF MEANS FOR PROVIDING A STEADY DRIVING PRESSURE; TANK MEANS FOR SUPPLYING A QUANTITY OF LIQUID UNDER SAID DRIVING PRESSURE; A RETAINING VESSEL; MEANS FOR MAINTAINING FLOW AT A SELECTED NOMINAL RATE FROM SAID TANK MEANS INTO SAID RETAINING VESSEL THROUGH A FLOW METER TO BE CALIBRATED; MEANS OPERATIVELY ASSOCIATED WITH SAID RETAINING VESSEL FOR CONSTANTLY ASSURING A SUBSTANTIALLY SMOOTH LIQUID SURFACE; AND MEANS ACTUATED BY THE LIQUID SURFACE FOR DETERMINING AND RECORDING THE TIME FOR A KNOW VOLUME OF LIQUID TO BE FORCED INTO SAID RETAINING VESSEL AT THE SELECTED NOMINAL RATE.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |