US2420009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for transferring material in mines
Assignee: Joy Manufacturing Co
•
Filing: 1944-04-07
•
Granted: 1947-05-06
•
Expires: 1964-04-07
Abstract
No abstract record available.
Inventors
- 👤 Charles F Osgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:04
CPC Classifications
E; E21; E21F; E21F13/00; E21F13/02; B; B65; B65G; B65G37/00; B65G2812/00; B65G2812/01; B65G2812/012; B65G2812/014; B65G2812/015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB191008364A
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FR435193A
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US1512521A
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US1442342A
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US1602779A
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US2108536A
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US2225185A
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US2282704A
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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) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |