US3007875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Square loop ferrites
Assignee: Steatite Research Corp
•
Filing: 1959-06-23
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Granted: 1961-11-07
•
Expires: 1979-06-23
Abstract
No abstract record available.
Inventors
- 👤 Albers-Schoenberg Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:35
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 FERROMAGNETIC FERRITE COMPOSITION HAVING A SQUARE HYSTERESIS LOOP CONSISTING ESSENTIALLY OF A MANGANESE-MAGNESIUM FERRITE CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE PROPORTIONS STATED:
Claim 2
Dependent Claim
25 words
A FERROMAGNETIC FERRITE COMPOSITION HAVING A SQUARE HYSTERESIS LOOP CONSISTING ESSENTIALLY OF A MANGANESE-MAGNESIUM FERRITE CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS IN THE PROPORTIONS STATED:
References Cited (Backward Citations)
US1821208A
Cited
US2640813A
Cited
US2565111A
Cited
GB671788A
Cited
CH288866A
Cited
US2736708A
Cited
GB697219A
Cited
GB735375A
Cited
GB737284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |