US2877183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the magnetic properties of ferrite with a rectangular-shaped hysteresis loop
Assignee: Steatit Magnesia AG
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Filing: 1956-03-06
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Granted: 1959-03-10
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Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 Eckert Oskar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:48
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A MAGNESIUM MANGANESE FERRITE AT LEAST 90-99% THEREOF CONSISTING ESSENTIALLY OF THE COMPONENTS MNO, MGO AND FE2O3, THE REMAINING 1-10% CONSISTING OF LEAD FERRITE (PBFE2O4).
Claim 2
Dependent Claim
25 words
A MAGNESIUM MANGANESE FERRITE AT LEAST 90-99% THEREOF CONSISTING ESSENTIALLY OF THE COMPONENTS MNO, MGO AND FE2O3, THE REMAINING 1-10% CONSISTING OF LEAD FERRITE (PBFE2O4).
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |