Patent US2648056A successfully refreshed from Google Patents.
US2648056A
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Well logging method and apparatus
Assignee: Union Oil Company of California
•
Filing: 1948-11-01
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Granted: 1953-08-04
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Expires: 1968-11-01
Abstract
No abstract record available.
Inventors
- 👤 Jakosky John Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/08; E21B47/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1547574A
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US1547575A
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US2156052A
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GB546202A
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US2368532A
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US2408458A
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US2460316A
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US2398562A
Cited
US2500638A
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US2595241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |