US2842961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow measurement in wells
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1954-09-16
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Granted: 1958-07-15
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Expires: 1974-09-16
Abstract
No abstract record available.
Inventors
- 👤 Doll Henri Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:05
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/07; G01F15/075; E; E21; E21B; E21B47/00; E21B47/10; G01F1/00; G01F1/05; G01F1/20; G01F1/28; G01F1/56; G01F1/58; G01F1/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2329386A
Cited
US2652720A
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US2741917A
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US2686618A
Cited
US2612845A
Cited
US2729101A
Cited
US2729102A
Cited
US2741916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |