Patent US2701039A successfully refreshed from Google Patents.
US2701039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well substructure for rotary drilling
Assignee: Lee C Moore Corp
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Filing: 1950-07-11
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Granted: 1955-02-01
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Expires: 1970-07-11
Abstract
No abstract record available.
Inventors
- 👤 Homer J Woolslayer
- 👤 Charles D Iddings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:05
CPC Classifications
E; E21; E21B; E21B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1840705A
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US2086650A
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US2327680A
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US2365370A
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US2413149A
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US2424862A
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US2463841A
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US2577642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |