US3454870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife structure electrode,support,and sealing means for borehole logging apparatus
Assignee: Dresser Industries Inc
•
Filing: 1967-01-06
•
Granted: 1969-07-08
•
Expires: 1987-01-06
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Lintelman
- 👤 Jake H Le Bus
- 👤 James Lee Norman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:46
CPC Classifications
E; E21; E21B; E21B47/00; G; G01; G01V; G01V3/00; G01V3/18; G01V3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2400678A
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US2588717A
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US2632795A
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US2873423A
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US3267366A
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US3379963A
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US3379964A
Cited
US3379965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |