US2334475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for investigating earth formations traversed by boreholes
Assignee: Schlumberger Well Surveying Corp
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Filing: 1939-12-04
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Granted: 1943-11-16
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Expires: 1959-12-04
Abstract
No abstract record available.
Inventors
- 👤 Claudet Aime
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:35
CPC Classifications
G; G01; G01V; G01V8/00; G01V8/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-11-15 | 1947-05-17 | 1947-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-15 | 1951-05-17 | 1951-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-15 | 1955-05-17 | 1955-11-16 | $7700.00 | Window Closed / Lapsed |