Patent US2938708A successfully refreshed from Google Patents.
US2938708A
Expired / Lapsed
US
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Simultaneous drilling and electrical logging of hydrocarbon contents of formations
Assignee: Individual
•
Filing: 1957-09-19
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Granted: 1960-05-31
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Expires: 1977-09-19
Abstract
No abstract record available.
Inventors
- 👤 Jan J Arps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:43
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/005; G; G01; G01V; G01V3/00; G01V3/18; G01V3/26; G01V3/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1819646A
Cited
US2268137A
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US2268138A
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US2370814A
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US2400170A
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US2388141A
Cited
US2568241A
Cited
US2625374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |