US2569854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill tool
Assignee: Individual
•
Filing: 1949-08-02
•
Granted: 1951-10-02
•
Expires: 1969-08-02
Abstract
No abstract record available.
Inventors
- 👤 Alexander P Hatcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:54
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0453; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/041; B23B2250/00; B23B2250/12; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/50; Y10T408/51; Y10T408/81
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) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |