Patent US2748358A successfully refreshed from Google Patents.
US2748358A
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Combination oil well tubing and electrical cable construction
Assignee: Signal Oil and Gas Co
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Filing: 1952-01-08
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Granted: 1956-05-29
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Expires: 1972-01-08
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:16
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/028; H; H01; H01B; H01B7/00; H01B7/04; H01B7/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1592012A
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US1981460A
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US1930926A
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US1994886A
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US2096279A
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US2091597A
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US2229211A
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US2196314A
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US2339274A
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US2197392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |