US2718265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for automatically filling well casing
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1950-11-25
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Granted: 1955-09-20
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Expires: 1970-11-25
Abstract
No abstract record available.
Inventors
- 👤 Martin B Conrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:29
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339; Y10T137/7722; Y10T137/7781; Y10T137/7837; Y10T137/785; Y10T137/7851
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1153373A
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US1216872A
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US2179226A
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US2211846A
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US2204658A
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US2326462A
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US2330267A
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US2644527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |