US3614837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dredging and sifting mud sands or gravel
Assignee: Individual
•
Filing: 1969-06-05
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Granted: 1971-10-26
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Expires: 1989-06-05
Abstract
Abstract A DEVICE FOR DREDGING UP AND SIFTING MUD, SAND AND GRAVEL, WHICH DEVICE COMPRISES A BOOM THAT CAN BE DIPPED INTO WATER FROM ABOARD A SHIP OR FROM THE LAND, A SCOOPCARRYING DRUM ROTATABLY MOUNTED ON THE END OF THE LADDER, SCOOPS ON THE PERIPHERY OF THE DRUM, A COLLECTING SPACE WITHIN THE DRUM AND PARTITIONED FROM EACH SCOOP BY MEANS OF A SCREEN, AND A SUCTION PIPE ONE END OF WHICH OPENS TO THE COLLECTING SPACE THROUGH ONE SIDE OF THE DRUM WHILE ITS OTHER END PROJECTS ABOVE THE SURFACE OF THE WATER.
Inventors
- 👤 Toshinobu Araoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:29
CPC Classifications
F; F16; F16H; F16H39/00; F16H39/02; E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/92; E02F3/9212; E02F3/9225; E02F3/9237; E02F3/9287; F16F; F16F15/00; F16F15/10
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |