US2776809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for mining by drilling, coring, and breaking
Assignee: Joy Manufacturing Co
•
Filing: 1953-05-19
•
Granted: 1957-01-08
•
Expires: 1973-05-19
Abstract
No abstract record available.
Inventors
- 👤 Barrett Arthur Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:43
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/10; E21C27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US376719A
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US1313695A
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US736846A
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US2078863A
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US2211751A
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US2520040A
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US2572403A
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US2654586A
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US2619339A
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US2659585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |