US2674049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for subsurface exploration
Assignee: Union Oil Company of California
•
Filing: 1948-11-16
•
Granted: 1954-04-06
•
Expires: 1968-11-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Ivor J James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/022; E21B47/0224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2190950A
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US2262245A
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US2415221A
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US2547876A
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US2466803A
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US2507351A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |