US2570945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit having file teeth
Assignee: Individual
•
Filing: 1946-02-27
•
Granted: 1951-10-09
•
Expires: 1966-02-27
Abstract
No abstract record available.
Inventors
- 👤 Hawkins General Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:54
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/0002; B23B51/02; B23B49/00; B23B49/003; B23B49/005; B23B2251/00; B23B2251/44; B23B2260/00; B23B2260/072; B23B2260/104; Y; Y10; Y10T; Y10T407/00; Y10T407/18; Y10T407/1815; Y10T408/00; Y10T408/89; Y10T408/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |