US3055832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically annealed ferrite material
Assignee: Ampex Corp
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Filing: 1960-06-10
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Granted: 1962-09-25
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Expires: 1980-06-10
Abstract
No abstract record available.
Inventors
- 👤 Robert S Weisz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:08
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; C04B35/2666
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
80NIFE204, 0.20FE2O4 TO 0.50NIFE2O4, 0.50FE204
Claim 2
Independent Claim
131 words
THE METHOD OF MAGNETICALLY ANNEALING SUBSTANTIALLY COBALT-FREE MANGANESE-FERROUS MATERIAL HAVING A COMPOSITION IN MOL PERCENT SELECTED FROM THE RANGE FROM 0.87MNFE2O4, O.13FE2O4 TO 0.60MNFE2O4, 0.40FE2O4 SAID METHOD COMPRISING SINTERING SAID MATERIAL AT A TEMPERATURE BETWEEN 1150* C, AND 1450* C, WHILE IN AN INERT ATMOSPHERE, QUENCHING SAID MATERIAL WHILE IN AN INERT ATMOSPHERE, HEATING SAID MATERIAL TO A TEMPERATURE BETWEEN 200 TO 500 DEGREES CENTIGRADE BELOW SAID SINTERING TEMPERATURE WHILE IN AN INERT ATMOSPHERE, QUENCHING SAID MATERIAL WHILE IN AN INERT ATMOSPHERE, HEATING SAID MATERIAL TO A TEMPERATURE BETWEEN 200 DEGREES CENTIGRADE AND THE CURUE TEMPERATURE, MAINTAINING SAID MATERIAL AT SAID TEMPERATURE FOR AT LEAST 15 MINUTES, APPLYING A MAGNETIC FIELD TO SAID MATERIAL WHILE SAID TEMPERATURE IS MAINTAINED, AND ALLOWING SAID MATERIAL TO COOL WHILE SAID MAGNETIC FIELD IS APPLIED.
Claim 3
Independent Claim
19 words
THE METHOD OF MAGNETICALLY ANNEALING SUBSTANTIALLY COBALT-FREE NICKEL-FERROUS MATERIAL HAVING A COMPOSITION IN MOL PERCENT IN THE RANGE FROM
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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |