US2905641A
Expired / Lapsed
US
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Method of manufacturing a magnet core having an approximately rectangular hysteresis loop
Assignee: US Philips Corp
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Filing: 1954-12-20
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Granted: 1959-09-22
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Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Esveldt Cornelis Jacobus
- 👤 Gorter Evert Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:20
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A FERROMAGNETIC FERRITE HAVING A SUBSTANTIALLY SQUARE HYSTERESIS LOOP CONSISTING ESSENTIALLY OF A COMPOSITION HAVING THE FORMULA
Claim 2
Dependent Claim
17 words
A FERROMAGNETIC FERRITE HAVING A SUBSTANTIALLY SQUARE HYSTERESIS LOOP CONSISTING ESSENTIALLY OF A COMPOSITION HAVING THE FORMULA
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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |