US3047316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packed pin and box drill pipe coupling with means preventing extrusion of packing ring
Assignee: ATLAS BRADFORD Co
•
Filing: 1958-10-01
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Granted: 1962-07-31
•
Expires: 1978-10-01
Abstract
No abstract record available.
Inventors
- 👤 Wehring Elwood
- 👤 Alfred A Dula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:10
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/001; F16L15/003; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; F16L15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2051499A
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US659336A
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US1226921A
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US1590357A
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US2150221A
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US2087185A
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US2196966A
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US2825585A
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GB777901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |