US2697941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Determining zones of fluid flow in a well bore
Assignee: Standard Oil Development Co
•
Filing: 1950-09-14
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Granted: 1954-12-28
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Expires: 1970-09-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas V Moore
- 👤 Robert R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:34
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |