US546041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twist-drill
Assignee: —
•
Filing: —
•
Granted: 1895-09-10
•
Expires: 1912-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:38
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/02; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/909; Y10T408/9095; Y10T408/9097
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) | 1898-09-09 | 1899-03-11 | 1899-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1902-09-10 | 1903-03-12 | 1903-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1906-09-10 | 1907-03-12 | 1907-09-11 | $7700.00 | Window Closed / Lapsed |