Patent US2686566A successfully refreshed from Google Patents.
US2686566A
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Oil well sampling device
Assignee: Sunoco Inc
•
Filing: 1951-06-21
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Granted: 1954-08-17
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Expires: 1971-06-21
Abstract
No abstract record available.
Inventors
- 👤 William E Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:42
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/081; E21B49/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2265962A
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US2342367A
Cited
US2404825A
Cited
US2509608A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |