US2737284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor clean-up mechanism for continuous mining apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1949-05-26
•
Granted: 1956-03-06
•
Expires: 1969-05-26
Abstract
No abstract record available.
Inventors
- 👤 Charles F Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:55
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1256642A
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US1684943A
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US1528474A
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US1431857A
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US1630598A
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US1866789A
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GB490066A
Cited
GB503338A
Cited
US2282626A
Cited
GB620664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |