US2680606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact machine for the mining of coal
Assignee: Individual
•
Filing: 1948-07-07
•
Granted: 1954-06-08
•
Expires: 1968-07-07
Abstract
No abstract record available.
Inventors
- 👤 Limited Martin S Bank
- 👤 Tilney Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:59
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/10; E21C27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1320144A
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US1806792A
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US981201A
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US1472563A
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GB160509A
Cited
US1439666A
Cited
US1500352A
Cited
US1482904A
Cited
US2336487A
Cited
US2520066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |