Patent US1226412A successfully refreshed from Google Patents.
US1226412A
Expired / Lapsed
US
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Coal-cutting machine.
Assignee: Individual
•
Filing: 1915-07-14
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Granted: 1917-05-15
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Expires: 1935-07-14
Abstract
No abstract record available.
Inventors
- 👤 William M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:38
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-05-14 | 1920-11-13 | 1921-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-05-14 | 1924-11-13 | 1925-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-05-14 | 1928-11-13 | 1929-05-15 | $7700.00 | Window Closed / Lapsed |