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Patent US2511408A successfully refreshed from Google Patents.
US2511408A
Expired / Lapsed
US
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Side wall sample taker
Assignee: Schlumberger Well Surveying Corp
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Filing: 1944-06-09
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Granted: 1950-06-13
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Expires: 1964-06-09
Abstract
No abstract record available.
Inventors
- 👤 Maurice P Lebourg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:18
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US53582A
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CH74758A
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US2048451A
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US2055506A
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US2149814A
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US2119361A
Cited
US2288210A
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US2276161A
Cited
US2281870A
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US2324551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |