US3426846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrievable well packer
Assignee: Schlumberger Technology Corp
•
Filing: 1967-08-10
•
Granted: 1969-02-11
•
Expires: 1987-08-10
Abstract
No abstract record available.
Inventors
- 👤 David E Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:29
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B33/12955; E21B33/1294
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2878877A
Cited
US3020959A
Cited
US3189095A
Cited
US3233675A
Cited
US3277965A
Cited
US3338308A
Cited
US3387658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |