US2924573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making manganese-zinc-ferrite
Assignee: International Standard Electric Corp
•
Filing: 1957-05-03
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Granted: 1960-02-09
•
Expires: 1977-05-03
Abstract
No abstract record available.
Inventors
- 👤 Sasaki Yozo
- 👤 Hamada Toshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:33
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/34; H01F1/342; H01F1/344; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2658
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS OF MAKING A FERRITE, COMPRISING MIXING 25-40 MOL PERCENT MNO, 10-25 MOL PERCENT ZNO, THE BALANCE BEING SUBSTANTIALLY FE2O3, SINTERING SAID MIXTURE AT A TEMPERATURE BETWEEN 1100-1350*C. TO FORM A FERRITE, AND THEN HEATING SAID FERRITE TO A TEMPERATURE BEBETWEEN 900*C. AND 1200*C., UNDER PRESSURE OF LESS THAN 0.5 MM. HG, FOR A PERIOD DEPENDENT ON SAID TEMPERATURE, TOLIBERATE OCCLUDED OXYGEN FROM THE FERRITE SURFACE.
Claim 2
Dependent Claim
67 words
A PROCESS OF MAKING A FERRITE, COMPRISING MIXING 25-40 MOL PERCENT MNO, 10-25 MOL PERCENT ZNO, THE BALANCE BEING SUBSTANTIALLY FE2O3, SINTERING SAID MIXTURE AT A TEMPERATURE BETWEEN 1100-1350*C. TO FORM A FERRITE, AND THEN HEATING SAID FERRITE TO A TEMPERATURE BEBETWEEN 900*C. AND 1200*C., UNDER PRESSURE OF LESS THAN 0.5 MM. HG, FOR A PERIOD DEPENDENT ON SAID TEMPERATURE, TOLIBERATE OCCLUDED OXYGEN FROM THE FERRITE SURFACE.
References Cited (Backward Citations)
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US2579978A
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GB669571A
Cited
US2549089A
Cited
US2597469A
Cited
US2764552A
Cited
US2723238A
Cited
US2705701A
Cited
US2856365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |