US3000828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of metal oxides and of ferrites
Assignee: International Standard Electric Corp
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Filing: 1955-03-03
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Granted: 1961-09-19
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Sidney Ernest Buckley
- 👤 Douglas H Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683; C01; C01G; C01G49/00; C01G49/02; C01G49/06; C04B35/2608; C04B35/2625; C01P; C01P2006/00; C01P2006/42; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
PROCESS OF MANUFACTURING A FERRITE WHICH COMPRISES HEATING IRON POWDER IN A CURRENT OF STEAM AT A TEMPERATURE BETWEEN 400*C. AND 650*C. FOR A TIME DEPEDENT UPON THE TEMPERATURE, MILLING THE RESULTANT PRODUCT IN WATER, CALCINING THE MILLED PRODUCT IN AIR AT A TEMPERATURE BETWEEN 150*C. AND 1000*C.
Claim 2
Dependent Claim
48 words
PROCESS OF MANUFACTURING A FERRITE WHICH COMPRISES HEATING IRON POWDER IN A CURRENT OF STEAM AT A TEMPERATURE BETWEEN 400*C. AND 650*C. FOR A TIME DEPEDENT UPON THE TEMPERATURE, MILLING THE RESULTANT PRODUCT IN WATER, CALCINING THE MILLED PRODUCT IN AIR AT A TEMPERATURE BETWEEN 150*C. AND 1000*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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |