US2638167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for well tubing
Assignee: Individual
•
Filing: 1948-06-28
•
Granted: 1953-05-12
•
Expires: 1968-06-28
Abstract
No abstract record available.
Inventors
- 👤 Edward N Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:13
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/1208; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1759; Y10T137/1767
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US218052A
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US1410827A
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US1577154A
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US1972791A
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US2197396A
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US2180605A
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US2169569A
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US2297044A
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US2276259A
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US2335578A
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US2329157A
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US2330564A
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US2319514A
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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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |