US3488970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Schlumberger Technology Corp
•
Filing: 1967-04-13
•
Granted: 1970-01-13
•
Expires: 1987-04-13
Abstract
No abstract record available.
Inventors
- 👤 James K Hallenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:56
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/01; E21B47/017; E21B47/0175; E21B36/00; E21B36/003; G; G01; G01V; G01V13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2671323A
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US2782318A
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US2714169A
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US3054840A
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US3038074A
Cited
US3154926A
Cited
US3192725A
Cited
US3265893A
Cited
US3287923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |