Patent US2890756A successfully refreshed from Google Patents.
US2890756A
Expired / Lapsed
US
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Hydraulic type junk basket for wells
Assignee: EDGAR T MURRAY
•
Filing: 1955-07-29
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Granted: 1959-06-16
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 William H Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:03
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2220989A
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US682939A
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US1333390A
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US2199298A
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US2233692A
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US2591488A
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US2662486A
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US2709104A
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US2751010A
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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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |