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US2569004A
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US
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Laterally flexible mine conveyer
Assignee: Joy Manufacturing Co
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Filing: 1949-06-15
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Granted: 1951-09-25
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Expires: 1969-06-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Joy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/10; B65G21/14; B65G19/00; B65G19/18; B65G19/28; B65G19/287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US793557A
Cited
US1800428A
Cited
US1987262A
Cited
US2250933A
Cited
US2388385A
Cited
US2512610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |