Patent US3384589A successfully refreshed from Google Patents.
US3384589A
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Nitrided iron powder core with controlled permeability coefficient
Assignee: Huntington Alloys Corp
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Filing: 1967-05-31
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Granted: 1968-05-21
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Expires: 1987-05-31
Abstract
No abstract record available.
Inventors
- 👤 Thornley Athelstan Dunton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:24
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0292; B; B22; B22F; B22F1/00; B22F1/14; B22F1/145; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2666724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |