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US3453530A
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Methods and apparatus for investigating earth formations including measuring the resistivity of radially different formation zones
Assignee: Schlumberger Technology Corp
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Filing: 1968-03-01
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Granted: 1969-07-01
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Expires: 1988-03-01
Abstract
No abstract record available.
Inventors
- 👤 Georges Attali
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:32
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/34
Claims Analysis
Total Claims: 0
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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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |