US3116255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic bodies containing magnetically coupled ferromagnetic and ferrimagnetic portions
Assignee: General Electric Co
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Filing: 1961-10-31
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Granted: 1963-12-31
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Expires: 1981-10-31
Abstract
No abstract record available.
Inventors
- 👤 William H Meiklejohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:30
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/32; H01F10/3218; B; B82; B82Y; B82Y25/00; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
AN ARTICLE OF MANUFACTURE COMPRISING, A FERROMAGNETIC SUBSTRATE BODY COMPOSED PRINCIPALLY OF A METAL SELECTED FROM THE GROUP CONSISTING OF RION, NICKEL, COBALT AND ALLOYS THEREOF, AND A FERRIMAGNETIC FERRITE LAYER SELECTED FROM THE GROUP CONSISTINF OF FE2O3 AND FERRITES OF THE METALS IRON, NICKEL, COBALT, ZINC, BARIUM, COPPER, MANGANESE AND MAGNESIUM, SAID FERRITE LAYER BEING MAGNETICALLY COUPLED TO SAID SUBSTRATE BODY BY HEATING THE ARTICLE TO A TEMPERATURE ABOVE THE NEEL TEMPERATURE (TN), THEN COOLING IT BELOW THE NEEL TEMPERATURE AND STRAINING THE ARTICLE TO ORDER THE MAGNETIC MOMENTS OF THE FERRITE LAYER.
Claim 2
Dependent Claim
94 words
AN ARTICLE OF MANUFACTURE COMPRISING, A FERROMAGNETIC SUBSTRATE BODY COMPOSED PRINCIPALLY OF A METAL SELECTED FROM THE GROUP CONSISTING OF RION, NICKEL, COBALT AND ALLOYS THEREOF, AND A FERRIMAGNETIC FERRITE LAYER SELECTED FROM THE GROUP CONSISTINF OF FE2O3 AND FERRITES OF THE METALS IRON, NICKEL, COBALT, ZINC, BARIUM, COPPER, MANGANESE AND MAGNESIUM, SAID FERRITE LAYER BEING MAGNETICALLY COUPLED TO SAID SUBSTRATE BODY BY HEATING THE ARTICLE TO A TEMPERATURE ABOVE THE NEEL TEMPERATURE (TN), THEN COOLING IT BELOW THE NEEL TEMPERATURE AND STRAINING THE ARTICLE TO ORDER THE MAGNETIC MOMENTS OF THE FERRITE LAYER.
Claim 3
Dependent Claim
13 words
AN ARTICLE AS DEFINED IN CLAIM 1 WHEREIN SAID FERRMAGNETIC FERRITE IS COFE2O4.
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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |