Patent US2822874A successfully refreshed from Google Patents.
US2822874A
Expired / Lapsed
US
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Combination packer and well control device
Assignee: Individual
•
Filing: 1954-02-25
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Granted: 1958-02-11
•
Expires: 1974-02-25
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:04
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1291; E21B33/1292
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US886114A
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US2301191A
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US2201433A
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US2230447A
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US2305062A
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US2343075A
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US2383453A
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US2578900A
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US2585706A
Cited
US2694451A
Cited
US2765852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |