US2824613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop devices for well conduits
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1952-03-24
•
Granted: 1958-02-25
•
Expires: 1972-03-24
Abstract
No abstract record available.
Inventors
- 👤 Reuben C Baker
- 👤 John R Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:18
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1021; E21B17/1028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US391226A
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US1201706A
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US1843202A
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US2134311A
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US2368409A
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US2365052A
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US2368401A
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US2351363A
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US2628682A
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US2622684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |