US2667223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sampling wells
Assignee: Stanolind Oil and Gas Co
•
Filing: 1948-08-03
•
Granted: 1954-01-26
•
Expires: 1968-08-03
Abstract
No abstract record available.
Inventors
- 👤 Riley F Farris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:07
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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US1670964A
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US2342367A
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US2407991A
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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) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |