US2527255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well rig
Assignee: Individual
•
Filing: 1945-08-13
•
Granted: 1950-10-24
•
Expires: 1965-08-13
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:32
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US652293A
Cited
US1634087A
Cited
US1658262A
Cited
US2113270A
Cited
US2215928A
Cited
US2179316A
Cited
US2168837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |