US2524707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill
Assignee: Individual
•
Filing: 1945-10-24
•
Granted: 1950-10-03
•
Expires: 1965-10-24
Abstract
No abstract record available.
Inventors
- 👤 Carl C Koeln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:46
CPC Classifications
E; E21; E21B; E21B6/00; E21B10/00; E21B10/36; E21B4/00; E21B4/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE152651C
Cited
US1697570A
Cited
US1810391A
Cited
US1745351A
Cited
US2252912A
Cited
US2371498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |