US2780787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic core construction
Assignee: General Electric Co
•
Filing: 1951-05-21
•
Granted: 1957-02-05
•
Expires: 1971-05-21
Abstract
No abstract record available.
Inventors
- 👤 Gareth G Somerville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:11
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245; H01F27/2455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1623345A
Cited
DE621987C
Cited
GB189922809A
Cited
FR674678A
Cited
US2300964A
Cited
US2552109A
Cited
US2584564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |