US2869072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for exploring ferromagnetic structure in well bores
Assignee: Ford Alexander Corp
•
Filing: 1953-09-17
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Granted: 1959-01-13
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Expires: 1973-09-17
Abstract
No abstract record available.
Inventors
- 👤 William R Gieske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:51
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9006; E; E21; E21B; E21B47/00; E21B47/09; E21B47/092; G01N27/9093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |