Patent US2760767A successfully refreshed from Google Patents.
US2760767A
Expired / Lapsed
US
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Floor clean-up mechanism for a continuous miner
Assignee: Joy Manufacturing Co
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Filing: 1952-06-17
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Granted: 1956-08-28
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Expires: 1972-06-17
Abstract
No abstract record available.
Inventors
- 👤 Barrett Arthur Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:55
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US611167A
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US1332292A
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US1811927A
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DE478650C
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US1903673A
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US2422645A
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US2415217A
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US2564038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |