Patent US1286283A successfully refreshed from Google Patents.
Patent US2879126A successfully refreshed from Google Patents.
US2879126A
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Method and apparatus for magnetic recording in a bore hole
Assignee: Sunoco Inc
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Filing: 1952-05-10
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Granted: 1959-03-24
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Expires: 1972-05-10
Abstract
No abstract record available.
Inventors
- 👤 Edward W James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:41
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/34; E; E21; E21B; E21B47/00; E21B47/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2479518A
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US2539553A
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US2623805A
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US2550427A
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US2640275A
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US2648589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |