Patent US5122153A successfully refreshed from Google Patents.
Patent US1726693A successfully refreshed from Google Patents.
Patent US1528908A successfully refreshed from Google Patents.
US658060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock-drill head.
Assignee: Individual
•
Filing: 1900-07-21
•
Granted: 1900-09-18
•
Expires: 1920-07-21
Abstract
No abstract record available.
Inventors
- 👤 William Archer Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:58
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62
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) | 1903-09-18 | 1904-03-19 | 1904-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-09-18 | 1908-03-19 | 1908-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-09-18 | 1912-03-19 | 1912-09-18 | $7700.00 | Window Closed / Lapsed |