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Patent US2711804A successfully refreshed from Google Patents.
US2711804A
Expired / Lapsed
US
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Oil well drilling structure
Assignee: Lee C Moore Corp
•
Filing: 1950-08-22
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Granted: 1955-06-28
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Expires: 1970-08-22
Abstract
No abstract record available.
Inventors
- 👤 Homer J Woolslayer
- 👤 Jenkins Cecil
- 👤 Charles D Iddings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:38
CPC Classifications
E; E21; E21B; E21B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1262930A
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US1862682A
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US2300480A
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US2327680A
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US2344390A
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US2387082A
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US2429010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-27 | 1958-12-27 | 1959-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-27 | 1962-12-27 | 1963-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-27 | 1966-12-27 | 1967-06-28 | $7700.00 | Window Closed / Lapsed |