Patent US2795873A successfully refreshed from Google Patents.
US2795873A
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US
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Method of hydraulic dredging
Assignee: Individual
•
Filing: 1947-09-12
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Granted: 1957-06-18
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Expires: 1967-09-12
Abstract
No abstract record available.
Inventors
- 👤 Richard T Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:32
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/001; F04D9/002; E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US790702A
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US790683A
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US1150686A
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US906234A
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US1147401A
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US1684490A
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US1890125A
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US1890317A
Cited
US1971441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |