US3572121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for pneumatically measuring liquid levels
Assignee: Nikex Nehezipari Kulkereskedelmi Vallalat
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Filing: 1969-09-16
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Granted: 1971-03-23
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Expires: 1989-09-16
Abstract
Abstract AN ARRANGEMENT FOR MEASURING LIQUID LEVELS BY PNEUMATIC MEANS, EQUIPPED WITH A GAS BOTTLE AND A MEASURING PROBE WHICH IS CONNECTED TO THE PIPE SYSTEM DIPPING BENEATH THE SURFACE OF THE LIQUID AND CONSISTING OF A FEED PIPE AND A MEASURING PIPE, SAID PROBE CONTROLLING THE SUPPLY OF GAS UNDER PRESSURE AND BEING PROVIDED WITH A DIAPHRAGM.
Inventors
- 👤 Zsolt Kesseru
- 👤 Tibor Willems
- 👤 Istvan Bagdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; E; E21; E21B; E21B47/00; E21B47/04; E21B47/047; G01F23/165; G01F23/167
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |