US2459196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical logging method and apparatus
Assignee: Sunoco Inc
•
Filing: 1938-12-22
•
Granted: 1949-01-18
•
Expires: 1958-12-22
Abstract
No abstract record available.
Inventors
- 👤 William H Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:21
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1826961A
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US1819923A
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US1863542A
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US1845379A
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US1894328A
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US2397254A
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US2140798A
Cited
US2414194A
Cited
US2133786A
Cited
US2400593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-18 | 1952-07-19 | 1953-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-18 | 1956-07-19 | 1957-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-18 | 1960-07-19 | 1961-01-18 | $7700.00 | Window Closed / Lapsed |