US6675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined construction and operation of the drill in rock-drilling
Assignee: —
•
Filing: —
•
Granted: 1849-08-28
•
Expires: 1866-08-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:55
CPC Classifications
E; E21; E21B; E21B6/00; E21B6/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1852-08-27 | 1853-02-26 | 1853-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1856-08-27 | 1857-02-26 | 1857-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1860-08-27 | 1861-02-26 | 1861-08-28 | $7700.00 | Window Closed / Lapsed |