US281922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock-drill
Assignee: —
•
Filing: —
•
Granted: 1883-07-24
•
Expires: 1900-07-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:27
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32
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) | 1886-07-23 | 1887-01-22 | 1887-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1890-07-23 | 1891-01-22 | 1891-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1894-07-23 | 1895-01-22 | 1895-07-24 | $7700.00 | Window Closed / Lapsed |