US52174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in bits for boring holes
Assignee: —
•
Filing: —
•
Granted: 1866-01-23
•
Expires: 1883-01-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:35
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/104; Y; Y10; Y10T; Y10T408/00; Y10T408/86; Y10T408/87; Y10T408/8725; Y10T408/8729
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) | 1869-01-22 | 1869-07-24 | 1870-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1873-01-22 | 1873-07-24 | 1874-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1877-01-22 | 1877-07-24 | 1878-01-23 | $7700.00 | Window Closed / Lapsed |