US3441084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cross-over apparatus and tools and method of operating a well installation
Assignee: Otis Engineering Corp
•
Filing: 1967-03-10
•
Granted: 1969-04-29
•
Expires: 1987-03-10
Abstract
No abstract record available.
Inventors
- 👤 John V Fredd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:02
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14; E21B23/00; E21B23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1431779A
Cited
US3008522A
Cited
US2806429A
Cited
US3086592A
Cited
US3302721A
Cited
US3333639A
Cited
US3322192A
Cited
US3363693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |