US2592358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal mining machine
Assignee: Individual
•
Filing: 1947-07-05
•
Granted: 1952-04-08
•
Expires: 1967-07-05
Abstract
No abstract record available.
Inventors
- 👤 Ii Temple W Tutwiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:52
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/08; E21C35/12; E21C35/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US419199A
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US502426A
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US1127395A
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US1190300A
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US1327052A
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US1522693A
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DE574268C
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DE642686C
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |