US2939570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ship unloading apparatus
Assignee: Dravo Corp
•
Filing: 1956-07-24
•
Granted: 1960-06-07
•
Expires: 1976-07-24
Abstract
No abstract record available.
Inventors
- 👤 Howard E Dykeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:20
CPC Classifications
B; B65; B65G; B65G67/00; B65G2814/00; B65G2814/03; B65G2814/0397; Y; Y10; Y10S; Y10S297/00; Y10S297/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US469175A
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US619463A
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US1446985A
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US676075A
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US984706A
Cited
US1441249A
Cited
GB341023A
Cited
US1991652A
Cited
US2601558A
Cited
US2805762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |