Patent US3446283A successfully refreshed from Google Patents.
US3446283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for simultaneously cleaning a well and removing a downhole tool
Assignee: Individual
•
Filing: 1968-01-02
•
Granted: 1969-05-27
•
Expires: 1988-01-02
Abstract
No abstract record available.
Inventors
- 👤 August B Baumstimler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:37
CPC Classifications
E; E21; E21B; E21B37/00
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) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |