US2750569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irreversible tool joint and electrical coupling for use in wells
Assignee: Signal Oil and Gas Co
•
Filing: 1952-01-08
•
Granted: 1956-06-12
•
Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Moon James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/46; H01R13/52; H01R13/523; E; E21; E21B; E21B17/00; E21B17/02; E21B17/028; H01B; H01B7/00; H01B7/0072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US211833A
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US2089844A
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US2102625A
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US2096279A
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US2301783A
Cited
US2479483A
Cited
US2563762A
Cited
US2485763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |