US3378080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operated actuated operator tool for well tools
Assignee: Otis Engineering Corp
•
Filing: 1965-09-13
•
Granted: 1968-04-16
•
Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 John V Fredd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:15
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1805815A
Cited
US3070167A
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US3102594A
Cited
US3052302A
Cited
US3163226A
Cited
US3279543A
Cited
US3302721A
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 |