US3409078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-fill and flow control safety valve
Assignee: Halliburton Co
•
Filing: 1967-11-13
•
Granted: 1968-11-05
•
Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Knox Lloyd Carter
- 👤 John W Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:28
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3126060A
Cited
US2698054A
Cited
US2630178A
Cited
US2642140A
Cited
US3062296A
Cited
US3223159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |