US2933837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator discharge hydraulic dredge
Assignee: Individual
•
Filing: 1953-07-06
•
Granted: 1960-04-26
•
Expires: 1973-07-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:10
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/90; E02F3/907; E02F3/92; E02F3/9212; E02F3/9225; E02F3/9231
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2242520A
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US2361404A
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US2521508A
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US2762136A
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |