US790331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core-drill apparatus.
Assignee: DAVIS CALYX DRILL Co
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Filing: 1904-08-25
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Granted: 1905-05-23
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Expires: 1924-08-25
Abstract
No abstract record available.
Inventors
- 👤 Coleman A Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:27
CPC Classifications
E; E21; E21B; E21B25/00
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) | 1908-05-22 | 1908-11-21 | 1909-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-05-22 | 1912-11-21 | 1913-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-05-22 | 1916-11-21 | 1917-05-23 | $7700.00 | Window Closed / Lapsed |