US3554011A
Expired / Lapsed
US
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Method and device for determining the convey concentration of dredging spoil of a suspension of dredging spoil and water
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 A SYSTEM FOR MEASURING THE CONCENTRATION OF A DREDGING SPOIL SUSPENSION WHEREIN THE SUSPENSION IS CAUSED TO FLOW VERTICALLY UPWARDS AND VERTICALLY DOWNWARDS IN TWO PIPE SECTIONS. UPPER AND LOWER CONDUITS ARE COUPLED BETWEEN CORRESPONDING UPPER AND LOWER POINTS ON THE TWO VERTICAL PIPE SECTIONS, AND A PRESSURE PICKUP IS OBTAINED BETWEEN THE MIDPOINTS OF THE UPPER AND LOWER CONDUIT.
Inventors
- 👤 Romke Van Der Veen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:02
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/26; E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/907
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 |