US2796133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive-action storm choke for dualzone completions
Assignee: Gulf Research and Development Co
•
Filing: 1954-05-26
•
Granted: 1957-06-18
•
Expires: 1974-05-26
Abstract
No abstract record available.
Inventors
- 👤 Howard J Endean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:16
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14; E21B34/00; E21B34/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1860080A
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US2077912A
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US2104660A
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US2384192A
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US2403987A
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US2368428A
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US2404876A
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US2357189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |