US2685568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft ferromagnetic mixed ferrite material
Assignee: General Electric Co
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Filing: 1950-05-10
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Granted: 1954-08-03
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Expires: 1970-05-10
Abstract
No abstract record available.
Inventors
- 👤 Volney C Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:38
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A SOFT MAGNETIC MIXED CRYSTAL FERRITE MATERIAL CONSISTING ESSENTIALLY OF NICKEL FERRITE, ZINC FERRITE AND COPPER FERRITE AND HAVING A METAL OXIDE CONTENT OF 47 TO 49 MOL PER CENT IRON OXIDE. 1 TO 8 MOL PER CENT COPPER OXIDE, 28 TO 38 MOL PER CENT ZINC OXIDE, BALANCE NICKEL OXIDE, SAID MIXED FERRITE HAVING A D. C. RESISTIVITY GREATER THAN 107 OHM-CM, AND A MAGNETIC INDUCTION GREATER THAN 400 GAUSS AT A FIELD STRENGTH OF 1 OERSTED.
Claim 2
Dependent Claim
78 words
A SOFT MAGNETIC MIXED CRYSTAL FERRITE MATERIAL CONSISTING ESSENTIALLY OF NICKEL FERRITE, ZINC FERRITE AND COPPER FERRITE AND HAVING A METAL OXIDE CONTENT OF 47 TO 49 MOL PER CENT IRON OXIDE. 1 TO 8 MOL PER CENT COPPER OXIDE, 28 TO 38 MOL PER CENT ZINC OXIDE, BALANCE NICKEL OXIDE, SAID MIXED FERRITE HAVING A D. C. RESISTIVITY GREATER THAN 107 OHM-CM, AND A MAGNETIC INDUCTION GREATER THAN 400 GAUSS AT A FIELD STRENGTH OF 1 OERSTED.
References Cited (Backward Citations)
US1976230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |