US2593693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine shaft mucking apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1946-02-18
•
Granted: 1952-04-22
•
Expires: 1966-02-18
Abstract
No abstract record available.
Inventors
- 👤 Charles F Osgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:15
CPC Classifications
E; E21; E21D; E21D1/00; E21D1/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE156395C
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US553082A
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DE577621C
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US2268570A
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US2326172A
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US2438660A
Cited
US2440501A
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US2426591A
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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) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |