Patent US2725940A successfully refreshed from Google Patents.
US2725940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dump bailer for wells
Assignee: Mccullough Tool Co
•
Filing: 1954-08-25
•
Granted: 1955-12-06
•
Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 Garold A Shidell
- 👤 Clyde L Bonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:28
CPC Classifications
E; E21; E21B; E21B27/00; E21B27/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |