US2680483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for recovering lost drill pipe
Assignee: Individual
•
Filing: 1949-05-02
•
Granted: 1954-06-08
•
Expires: 1969-05-02
Abstract
No abstract record available.
Inventors
- 👤 Bus Franklin L Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:13
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/12; E21B31/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1696378A
Cited
US1718771A
Cited
US1908174A
Cited
US2078426A
Cited
US2199020A
Cited
US2285213A
Cited
US2315629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |