US2879884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile conveyor apparatus for underground mines
Assignee: Joy Manufacturing Co
•
Filing: 1955-12-12
•
Granted: 1959-03-31
•
Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Joy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:30
CPC Classifications
E; E21; E21F; E21F13/00; E21F13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2420009A
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US2491158A
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US2525555A
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GB611784A
Cited
US2597345A
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US2594695A
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US2592532A
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US2674364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |