US2817555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system of retrieving stuck pipe joints in well bores
Assignee: WASH OVERSHOT AND SPEAR ENGINEERS Inc
•
Filing: 1953-03-12
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Granted: 1957-12-24
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Expires: 1973-03-12
Abstract
No abstract record available.
Inventors
- 👤 Sr Franklin L Lebus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:15
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/12; E21B31/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49821
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1767286A
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US2122602A
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US2281389A
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US2416613A
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US2449841A
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US2762438A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |