US3587316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bubble pipe attachment
Assignee: Individual
•
Filing: 1968-09-03
•
Granted: 1971-06-28
•
Expires: 1988-09-03
Abstract
Abstract THE LIQUID LEVEL IN A TANK IS DETERMINED BY SUSPENDING AN AIR BUBBLE PIPE IN THE LIQUID AND THE PRESSURE ON THE AIR IS MEASURED AS THE AIR BUBBLES EMERGE FROM THE LOWER OPEN END OF THE PIPE. THE OPEN END OF THE PIPE IS KEPT OPEN BY PROVIDING A WIPING ROD WITHIN THE PIPE. THE ROD PROTRUDES FROM THE OPEN END OF THE BUBBLE PIPE AND BLADES ARE ATTACHED TO THE PROTRUDING END OF THE ROD. THE BLADES ARE ENGAGEABLE WITH THE SURROUNDING LIQUID CURRENTS, THUS MOVING THE ROD AND WIPING THE LOWER MARGIN OF THE BUBBLE PIPE.
Inventors
- 👤 Bastiaan Kapteyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/165
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |