US2798712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous mining apparatus of the pivoted boom type
Assignee: Joy Manufacturing Co
•
Filing: 1948-03-30
•
Granted: 1957-07-09
•
Expires: 1968-03-30
Abstract
No abstract record available.
Inventors
- 👤 Charles F Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:02
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US779442A
Cited
US1002014A
Cited
US1508634A
Cited
US1635780A
Cited
US1794367A
Cited
US1549701A
Cited
US1588564A
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US1721002A
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US1867853A
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US1839625A
Cited
US1873008A
Cited
US1997247A
Cited
US1908179A
Cited
US2060226A
Cited
US1979050A
Cited
US1966131A
Cited
US2010449A
Cited
US2025306A
Cited
DE727439C
Cited
US2334772A
Cited
US2281503A
Cited
US2241359A
Cited
US2269781A
Cited
US2287230A
Cited
US2520040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |