Patent US2476137A successfully refreshed from Google Patents.
US2476137A
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Method of positioning apparatus in boreholes
Assignee: Schlumberger Well Surveying Corp
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Filing: 1942-05-16
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Granted: 1949-07-12
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Expires: 1962-05-16
Abstract
No abstract record available.
Inventors
- 👤 Doll Henri-Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:30
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/119; E21B47/00; E21B47/04; E21B47/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1893600A
Cited
US2246542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |