Patent US2736288A successfully refreshed from Google Patents.
US3125879A
Expired / Lapsed
US
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Flow rate calibration
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:15
CPC Classifications
G; G01; G01F; G01F25/00; G01F25/10; G01F25/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
APPARATUS FO CALIBRATING A GAS FLOW METER COMPRISING A LINEAR CYLINDER ONE END OF WHICH COMMUNICATES WITH THE ATMOSPHERE, A FREE PSITON SLIDABLE IN TH ECYLINDER BELOW SAID END, MEANS EXTERNAL OF SAID CYLINDER MEASURING THE TIME OF TRAVEL OF SAID PISTON FROM A DATUM TO A PREDETERMINED POINT AS A FUNCTION OF RATE OF FLOW OF GAS INDICENT ON SAID PISTON IN SAID CYLINDER, AND MEANS CONDUCTING GAS AND IN COMMUNICATION WITH SUCH FLOW METER AND SAID CYLINDER ONLY ON THE SIDE OF SAID PISTON.
Claim 2
Dependent Claim
86 words
APPARATUS FO CALIBRATING A GAS FLOW METER COMPRISING A LINEAR CYLINDER ONE END OF WHICH COMMUNICATES WITH THE ATMOSPHERE, A FREE PSITON SLIDABLE IN TH ECYLINDER BELOW SAID END, MEANS EXTERNAL OF SAID CYLINDER MEASURING THE TIME OF TRAVEL OF SAID PISTON FROM A DATUM TO A PREDETERMINED POINT AS A FUNCTION OF RATE OF FLOW OF GAS INDICENT ON SAID PISTON IN SAID CYLINDER, AND MEANS CONDUCTING GAS AND IN COMMUNICATION WITH SUCH FLOW METER AND SAID CYLINDER ONLY ON THE SIDE OF SAID PISTON.
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) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |