US2961407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed ferrite composition
Assignee: General Electric Co
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Filing: 1954-06-30
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Granted: 1960-11-22
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Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Leon T Piekarski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:24
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A SOFT FERROMAGENIC SPINEL FERRITE BODY HAVING A RESISTIVITY OF AT LEAST 20,000 MEGOHM-CENTIMETERS AT ROOM TEMPERATURE AND A ROOM TEMPERATURE MERIT FACTOR OF AT LEAST 21,000 MEASURED AT 0.6 MEGACYCLE SAID BODY FORMED BY FIRING A FORMED MIXTURE OF METAL OXIDES CONSISTING ESENTIALLY OF 47 TO 49 MOL PERCENT IRON OXIDE, 29 TO 31 MOL PERCENT ZINC OXIDE, 1 TO 2 MOL PERCENT MANGANESE OXIDE, AND THE BALANCE NICKEL OXIDE, IN AN OXIDIZING ATMOSPHERE AT 1150 DEGREE C TO 1250 DEGREE C.
Claim 2
Dependent Claim
83 words
A SOFT FERROMAGENIC SPINEL FERRITE BODY HAVING A RESISTIVITY OF AT LEAST 20,000 MEGOHM-CENTIMETERS AT ROOM TEMPERATURE AND A ROOM TEMPERATURE MERIT FACTOR OF AT LEAST 21,000 MEASURED AT 0.6 MEGACYCLE SAID BODY FORMED BY FIRING A FORMED MIXTURE OF METAL OXIDES CONSISTING ESENTIALLY OF 47 TO 49 MOL PERCENT IRON OXIDE, 29 TO 31 MOL PERCENT ZINC OXIDE, 1 TO 2 MOL PERCENT MANGANESE OXIDE, AND THE BALANCE NICKEL OXIDE, IN AN OXIDIZING ATMOSPHERE AT 1150 DEGREE C TO 1250 DEGREE C.
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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |