US2867412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling machine for rock faces and the like
Assignee: F Taylor & Sons (manchester) Ltd
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Filing: 1955-08-03
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Granted: 1959-01-06
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Expires: 1975-08-03
Abstract
No abstract record available.
Inventors
- 👤 Hurd Eric Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:44
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B15/00; E21B15/04
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) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |