US3049382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-friction sucker rod coupling
Assignee: Liberty Manufacturing Co of Texas
•
Filing: 1960-12-20
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Granted: 1962-08-14
•
Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 George E Ell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:55
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605316A
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US1863823A
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US2247564A
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US2725264A
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US2815253A
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US2946094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |