US3378069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well maintenance and completion tools
Assignee: Schlumberger Technology Corp
•
Filing: 1964-08-13
•
Granted: 1968-04-16
•
Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Roger Q Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:39
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2037938A
Cited
US2655217A
Cited
US2876843A
Cited
US3045748A
Cited
US3040808A
Cited
US3168141A
Cited
US3087551A
Cited
US3105550A
Cited
US3200882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |