US3388375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape recording methods and apparatus for well logging
Assignee: Schlumberger Technology Corp
•
Filing: 1965-10-26
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Granted: 1968-06-11
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Expires: 1985-10-26
Abstract
No abstract record available.
Inventors
- 👤 William J Sloughter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:00
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/12; G; G01; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3106612A
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US2904682A
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US3075607A
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US3134957A
Cited
US3286033A
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US3277440A
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US3329931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |