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Patent US3455578A successfully refreshed from Google Patents.
US3455578A
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Fluid pressure releasable automatic tool joint
Assignee: Ventura Tool Co
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Filing: 1967-01-03
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Granted: 1969-07-15
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 James W E Hanes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:22
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B17/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE527928A
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US2104180A
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US2877732A
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GB932002A
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US3137348A
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US3155401A
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US3252718A
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US3338596A
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US3297344A
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US3326285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |