US2401280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for locating permeable formations traversed by boreholes
Assignee: Schlumberger Well Surveying Corp
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Filing: 1942-06-18
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Granted: 1946-05-28
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Expires: 1962-06-18
Abstract
No abstract record available.
Inventors
- 👤 John E Walstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:53
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; G01V9/00
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) | 1949-05-27 | 1949-11-26 | 1950-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-27 | 1953-11-26 | 1954-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-27 | 1957-11-26 | 1958-05-28 | $7700.00 | Window Closed / Lapsed |