US2800970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Creeper base for mining apparatus
Assignee: Joy Manufacturing Co
•
Filing: 1956-12-19
•
Granted: 1957-07-30
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Expires: 1976-12-19
Abstract
No abstract record available.
Inventors
- 👤 Barrett Arthur Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:55
CPC Classifications
E; E21; E21C; E21C31/00; B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2411
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US770286A
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US1615055A
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US2062657A
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US2132184A
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US2261160A
Cited
US2257181A
Cited
US2452632A
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US2410482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |