US2842207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for disconnecting well pipe joints
Assignee: Individual
•
Filing: 1955-09-06
•
Granted: 1958-07-08
•
Expires: 1975-09-06
Abstract
No abstract record available.
Inventors
- 👤 Ford I Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:44
CPC Classifications
E; E21; E21B; E21B31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1537007A
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US1568027A
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US1813015A
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US1817808A
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US1980156A
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US2305261A
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US2500305A
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US2629445A
Cited
US2745345A
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US2686039A
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US2716541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |