US2796134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preventing lost circulation in well drilling operations
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-07-19
•
Granted: 1957-06-18
•
Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 George W Binkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:29
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/10; E21B43/103; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1514062A
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US1834434A
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US2047774A
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US2092041A
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US2504462A
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US2708973A
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 |