US3040812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zone selector for wells
Assignee: Jersey Production Research Co
•
Filing: 1959-08-17
•
Granted: 1962-06-26
•
Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 Glenn O Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2304303A
Cited
US2307983A
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US2668500A
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US2766831A
Cited
US2681705A
Cited
US2717041A
Cited
US2839144A
Cited
US2951536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |