US3417824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lost circulation restoring devices
Assignee: Marathon Oil Co
•
Filing: 1967-12-26
•
Granted: 1968-12-24
•
Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Hendrik K Van Poollen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:40
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2634098A
Cited
US2609880A
Cited
US2504462A
Cited
US2748867A
Cited
US2768693A
Cited
US2824611A
Cited
US3190373A
Cited
US3362476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |