US2740834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically loaded electrical conductors
Assignee: AT&T Inc
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Filing: 1951-06-29
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Granted: 1956-04-03
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Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jr John G Kreer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:25
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/18; H01B; H01B11/00; H01B11/02; H01B11/12; H01B11/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |