Patent US3310894A successfully refreshed from Google Patents.
US3310894A
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Dredging method
Assignee: Individual
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Filing: 1964-05-11
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Granted: 1967-03-28
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Ball James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:52
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/8858; E02F3/8875; E02F3/90; E02F3/92; E21; E21C; E21C50/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF RECOVERING SOLID PARTICULATE MATERIAL FROM THE FLOOR OF A DEEP BODY OF WATER COMPRISING THE STEPS OF: TRAVERSING THE FLOOR OF THE BODY OF WATER WITH AN INTAKE OF A DUCT EXTENDING BETWEEN THE FLOOR AND A WORK STATION ON THE SURFACE OF THE BODY OF WATER, CAUSING A SUFFICIENT UPWARD FLOW OF WATER IN THE DUCT TO DELIVER SOLID PARTICULATE MATERIAL ENTRAINED THEREIN TO THE WORK STATION BY CONTINUOUSLY INTRODUCING A SUBSTANTIALLY INCOMPRESSIBLE LIQUID HAVING A DENSITY LESS THAN 1 INTO THE DUCT ADJACENT ITS LOWER END TO FORM A WATER/LIQUID MIXTURE WITHIN THE DUCT, SAID MIXTURE HAVING A DENSITY LESS THAN 1, SEPARATING THE SOLID PARTICULATE MATERIAL FROM THE WATER/ LIQUID MIXTURE ARRIVING AT THE WORK STATION, SEPARATING THE LIQUID FROM THE WATER/LIQUID MIXTURE, DISCARDING THE WATER, RE-INTRODUCING THE LIQUID INTO THE DUCT ADJACENT ITS LOWER END TO MAINTAIN THE UPWARD FLOW IN THE DUCT.
Claim 2
Independent Claim
150 words
THE METHOD OF RECOVERING SOLID PARTICULATE MATERIAL FROM THE FLOOR OF A DEEP BODY OF WATER COMPRISING THE STEPS OF: TRAVERSING THE FLOOR OF THE BODY OF WATER WITH AN INTAKE OF A DUCT EXTENDING BETWEEN THE FLOOR AND A WORK STATION ON THE SURFACE OF THE BODY OF WATER, CAUSING A SUFFICIENT UPWARD FLOW OF WATER IN THE DUCT TO DELIVER SOLID PARTICULATE MATERIAL ENTRAINED THEREIN TO THE WORK STATION BY CONTINUOUSLY INTRODUCING A SUBSTANTIALLY INCOMPRESSIBLE LIQUID HAVING A DENSITY LESS THAN 1 INTO THE DUCT ADJACENT ITS LOWER END TO FORM A WATER/LIQUID MIXTURE WITHIN THE DUCT, SAID MIXTURE HAVING A DENSITY LESS THAN 1, SEPARATING THE SOLID PARTICULATE MATERIAL FROM THE WATER/ LIQUID MIXTURE ARRIVING AT THE WORK STATION, SEPARATING THE LIQUID FROM THE WATER/LIQUID MIXTURE, DISCARDING THE WATER, RE-INTRODUCING THE LIQUID INTO THE DUCT ADJACENT ITS LOWER END TO MAINTAIN THE UPWARD FLOW IN THE DUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |