Patent US3401720A successfully refreshed from Google Patents.
US3401720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling fluid flow through conduit means
Assignee: Halliburton Co
•
Filing: 1965-03-30
•
Granted: 1968-09-17
•
Expires: 1985-03-30
Abstract
No abstract record available.
Inventors
- 👤 E B Telford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:57
CPC Classifications
E; E03; E03F; E03F7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1180282A
Cited
US2130030A
Cited
US2273984A
Cited
US2870794A
Cited
US2786535A
Cited
US2798561A
Cited
US3040779A
Cited
US3201975A
Cited
US3091259A
Cited
US3095177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |