Patent US2540146A successfully refreshed from Google Patents.
Patent US2398904A successfully refreshed from Google Patents.
Patent US589576A successfully refreshed from Google Patents.
US589576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating twist-drill
Assignee: —
•
Filing: —
•
Granted: 1897-09-07
•
Expires: 1914-09-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:25
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/06; B23B51/04; B23B51/0486; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455
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) | 1900-09-07 | 1901-03-09 | 1901-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1904-09-07 | 1905-03-09 | 1905-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1908-09-07 | 1909-03-09 | 1909-09-08 | $7700.00 | Window Closed / Lapsed |