US3030306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a magnet core having an approximately-rectangular hysteresis loop
Assignee: US Philips Corp
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Filing: 1955-01-10
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Granted: 1962-04-17
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Expires: 1975-01-10
Abstract
No abstract record available.
Inventors
- 👤 Gorter Evert Willem
- 👤 Wijn Henricus Petrus Johannes
- 👤 Esveldt Cornelis Jacobus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A METHOD OF MANUFACTURING A FERROMAGNETIC FERRITE HAVING A SUBSTANTIALLY SQUARE HYSTERESIS LOOP COMPRISING THE STEPS OF FORMING A MIXTURE OF OXIDES OF NICKEL, MANGANESE, AND IRON IN PROPORTIONS CORRESPONDING TO THE FORMULA:
Claim 2
Independent Claim
33 words
A METHOD OF MANUFACTURING A FERROMAGNETIC FERRITE HAVING A SUBSTANTIALLY SQUARE HYSTERESIS LOOP COMPRISING THE STEPS OF FORMING A MIXTURE OF OXIDES OF NICKEL, MANGANESE, AND IRON IN PROPORTIONS CORRESPONDING TO THE FORMULA:
References Cited (Backward Citations)
GB697219A
Cited
US2715109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |