US3554010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and suction dredging installations for conveying dredging spoil
Assignee: Ingenieursbureau voor Systemen en Octrooien Spanstaal BV
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Filing: 1969-04-21
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Granted: 1971-01-12
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Expires: 1989-04-21
Abstract
Abstract IN A METHOD AND APPARATUS FOR MEASURING THE QUANTITY OF A SUSPENSION OF DREDGING SPOIL AND WATER, MEANS ARE PROVIDED TO COMPENSATE FOR THE PRESENCE OF AIR IN THE SUSPENSION. THE MEASURE COMPENSATION IS DERIVED BY TAKING PRESSURE MEASUREMENTS OF AT LEAST TWO FLOW SECTIONS IN THE SYSTEM AT WHICH THE PREVAILING PRESSURES ARE DIFFERENT.
Inventors
- 👤 Romke Van Der Veen
- 👤 Jan De Koning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:14
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/907; G; G01; G01N; G01N9/00; G01N9/26
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |