Patent US2962822A successfully refreshed from Google Patents.
US2962822A
Expired / Lapsed
US
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Mine dredger
Assignee: Individual
•
Filing: 1956-11-28
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Granted: 1960-12-06
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Expires: 1976-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jonas L Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:55
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/30; E02; E02F; E02F3/00; E02F3/04; E02F3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US884960A
Cited
US1861194A
Cited
US1783787A
Cited
US1860481A
Cited
US2597036A
Cited
US2694355A
Cited
US2639048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |