Patent US3408573A successfully refreshed from Google Patents.
US3408573A
Expired / Lapsed
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Coil core manufactured from softmagnetic and permanent-magnetic materials
Assignee: US Philips Corp
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Filing: 1966-06-08
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Granted: 1968-10-29
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Expires: 1986-06-08
Abstract
No abstract record available.
Inventors
- 👤 Wullkopf Hellmuth
- 👤 Samow Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:42
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24; H01F1/26; H01F3/00; H01F3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A COIL CORE MANUFACTURED FROM SOFT-MAGNETIC AND PERMANENT-MAGNETIC MATERIALS IN WHICH THE PERMANENTMAGNETIC MATERIAL SERVES FOR BIAS MAGNETIZATION OF THE SOFT-MAGNETIC MATERIAL, CHARACTERIZED IN THAT THE COIL CORE CONSISTS OF A MIXTURE OF SOFT-MAGNETIC AND PERMANENTMAGNETIC MATERIALS IN POWDER FORM HOMOGENEOUSLY DISTRIBUTED IN A SOLID PLASTIC BINDER.
Claim 2
Dependent Claim
47 words
A COIL CORE MANUFACTURED FROM SOFT-MAGNETIC AND PERMANENT-MAGNETIC MATERIALS IN WHICH THE PERMANENTMAGNETIC MATERIAL SERVES FOR BIAS MAGNETIZATION OF THE SOFT-MAGNETIC MATERIAL, CHARACTERIZED IN THAT THE COIL CORE CONSISTS OF A MIXTURE OF SOFT-MAGNETIC AND PERMANENTMAGNETIC MATERIALS IN POWDER FORM HOMOGENEOUSLY DISTRIBUTED IN A SOLID PLASTIC BINDER.
References Cited (Backward Citations)
US2452531A
Cited
US3257586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |