US2984303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subsurface apparatus for controlling well production
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1957-09-30
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Granted: 1961-05-16
•
Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 John R Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:54
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2033563A
Cited
US2178540A
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US2624412A
Cited
US2630865A
Cited
US2761514A
Cited
US2799346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |