Patent US2740618A successfully refreshed from Google Patents.
US2740618A
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US
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Intermittent mining machine with turntable mounted rotary chipping heads
Assignee: COLMOL Co
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Filing: 1949-09-08
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Granted: 1956-04-03
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Expires: 1969-09-08
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Snyder
- 👤 Funk Harry Calvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:04
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US235563A
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US454895A
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US1953327A
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US1508634A
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US1770934A
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US2166569A
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US2269781A
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US2320653A
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US2546899A
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US2634963A
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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) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |