US2991437A
Expired / Lapsed
US
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Magnetic core
Assignee: "ELIN" AG fur ELEKTRISCHE INDUSTRIE
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Filing: 1956-09-18
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Granted: 1961-07-04
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Expires: 1976-09-18
Abstract
No abstract record available.
Inventors
- 👤 Kreuzer Josef
- 👤 Ascher Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |