US797111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock-drill or rock-drilling machine.
Assignee: Individual
•
Filing: 1904-11-23
•
Granted: 1905-08-15
•
Expires: 1924-11-23
Abstract
No abstract record available.
Inventors
- 👤 Henry Hellman
- 👤 Lewis Condict Bayles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:11
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14
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) | 1908-08-14 | 1909-02-13 | 1909-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1912-08-14 | 1913-02-13 | 1913-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1916-08-14 | 1917-02-13 | 1917-08-15 | $7700.00 | Window Closed / Lapsed |