US2788200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous miner having disintegrating head mechanism and floor-clean-up means carried on tiltable support
Assignee: Joy Manufacturing Co
•
Filing: 1952-11-15
•
Granted: 1957-04-09
•
Expires: 1972-11-15
Abstract
No abstract record available.
Inventors
- 👤 Barrett Arthur Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:16
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US720841A
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GB534090A
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US2269781A
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US2287230A
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US2418573A
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US2694562A
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US2630308A
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US2634963A
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US2695700A
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US2612361A
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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) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |