Patent US3573019A successfully refreshed from Google Patents.
US3573019A
Expired / Lapsed
US
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Liquid flow measuring process and apparatus
Assignee: Owens Corning
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Filing: 1965-07-30
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Granted: 1971-03-30
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Expires: 1985-07-30
Abstract
Abstract PROCESS AND APPARATUS FOR MEASURING RATE OF FLOW OF LIQUIDS THROUGH CONDUITS, COMPRISING IMMERSED PROBES FACING RESPECTIVELY AGAINST THE DIRECTION OF FLOW AND IN THE DIRECTION OF FLOW, WITH CONSTANT VOLUMERTIC GAS FLOW THROUGH EACH, AS SMALL DISCRETE BUBBLES ARISING FROM A POINT BENEATH THE SURFACE OF THE LIQUID TO THE SURFACE, WHEREBY A DIFFERENTIAL PRESSURE IS PRODUCED THAT SERVES AS A SIGNAL WHICH CAN BE EXTRAPOLATED TO VOLUME OF FLOW, AND TRANSDUCED FOR RECORDING AND CONTROL FUNCTIONS.
Inventors
- 👤 Vernon C Rees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:26
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0605; C; C03; C03B; C03B5/00; C03B5/16; C03B5/24
Claims Analysis
Total Claims: 0
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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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |