US2669690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistivity method for obtaining indications of permeable for mations traversed by boreholes
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1949-10-18
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Granted: 1954-02-16
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Expires: 1969-10-18
Abstract
No abstract record available.
Inventors
- 👤 Doll Henri-Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:20
CPC Classifications
E; E21; E21B; E21B49/00; G; G01; G01V; G01V11/00; G01V11/002; G01V11/005; G01V3/00; G01V3/18; G01V3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2455942A
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US2564861A
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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) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |