Patent US2956781A successfully refreshed from Google Patents.
US2956781A
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US
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Deflecting tool
Assignee: Eastman Oil Well Survey Co
•
Filing: 1958-02-17
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Granted: 1960-10-18
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Expires: 1978-02-17
Abstract
No abstract record available.
Inventors
- 👤 Harlan J Eastman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:32
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; E21B10/00; E21B10/08; E21B10/18; E21B7/00; E21B7/04; E21B7/06; E21B7/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1387447A
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US1859490A
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US2066671A
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US2197227A
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US2324102A
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US2686660A
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US2805045A
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US2830795A
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US2873092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |