Patent US3068400A successfully refreshed from Google Patents.
US3068400A
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Method and apparatus for determining the dip of strata penetrated by a borehole
Assignee: Pgac Dev Co
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Filing: 1958-10-01
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Granted: 1962-12-11
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Expires: 1978-10-01
Abstract
No abstract record available.
Inventors
- 👤 Jacques H Castel
- 👤 Lyman M Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:05
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1209102A
Cited
US1868833A
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US1928969A
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US2176169A
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US2364159A
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US2427950A
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US2332777A
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US2524360A
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US2674049A
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US2777070A
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US2823349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |