US2419847A
Expired / Lapsed
US
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Powdered iron magnetic core
Assignee: General Electric Co
•
Filing: 1944-06-02
•
Granted: 1947-04-29
•
Expires: 1964-06-02
Abstract
No abstract record available.
Inventors
- 👤 Armin F Mittermaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:01
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; H01F1/26; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49073; Y10T29/49075; Y10T29/49076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR647072A
Cited
US2043346A
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US1867362A
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US1982689A
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US1881711A
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US1948308A
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US1994534A
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US2195362A
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US2273891A
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US2330590A
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US2230228A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |