US2992389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging system
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1956-06-25
•
Granted: 1961-07-11
•
Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Gondouin Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:53
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2415808A
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US2661455A
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US2542057A
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US2755434A
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US2795759A
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US2780781A
Cited
US2739285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |