US3439260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging by nuclear magnetic detection of c**13
Assignee: IFP Energies nouvelles
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Filing: 1968-02-26
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Granted: 1969-04-15
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Expires: 1988-02-26
Abstract
No abstract record available.
Inventors
- 👤 Georges J Bene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/32; G01N; G01N24/00; G01N24/08; G01N24/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3135912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |