Patent US2626140A successfully refreshed from Google Patents.
US2626140A
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Mining machine
Assignee: Mavor and Coulson Ltd
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Filing: 1950-02-17
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Granted: 1953-01-20
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Expires: 1970-02-17
Abstract
No abstract record available.
Inventors
- 👤 Sproul John Connel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:48
CPC Classifications
E; E21; E21C; E21C29/00; E21C29/02; B; B23; B23K; B23K15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |