Patent JPS5622306A successfully refreshed from Google Patents.
Patent US3198716A successfully refreshed from Google Patents.
US3198716A
Expired / Lapsed
US
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Magnetic material and method of preparing the same
Assignee: General Electric Co
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Filing: 1961-12-21
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Granted: 1965-08-03
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Fred E Luborsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:56
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; C; C25; C25C; C25C5/00; C25C5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A PROCESS OF PREPARING FINE PARTICLE MAGNETIC MATERIAL COMPRISING ELECTROLYTICALY DEPPOSITING FINE PARTICLES INTO A LIQUID METAL CATHODE DURING AN ELETRODEPOSITION CYCLE SUFFICIENTLY LONG TO PRODUCE ELEONGATED SINGLE-DOMAIN MAGNETIC PARTICLES FROM AN ELECTROLYTE COMPRISING IONS SELECTED FROM THE CLASS CONSISTING OF IRON IONS, COBALT IONS, NICKEL IONS AND COMBINATIONS THEROF, WHILE MAINTAINING A QUIESCENT INTERFACE BETWEEN THE CATHOD AND THE ELCTROLYTE, THE IMPROVEMENT WHICH COMPRISES PROGRESSIVELY LOWERING THE CATHODE CURRENT DENSITY DURING A MAJOR PORTION OF THE ELECTROPDEPOSITON CYCLE WITHIN THE RANGE FROM A MAXIMUM OF 5 AMPS./CM.2 TO A MINIMUM OF 0.001 AMP./ CM.2 TO MAINTAIN A SUBSTANTIALLY CONSTANT MAXIMUM COERCIVE FORCE IN THE ELECTRODEPOSITED PARTICLES.
Claim 2
Dependent Claim
108 words
IN A PROCESS OF PREPARING FINE PARTICLE MAGNETIC MATERIAL COMPRISING ELECTROLYTICALY DEPPOSITING FINE PARTICLES INTO A LIQUID METAL CATHODE DURING AN ELETRODEPOSITION CYCLE SUFFICIENTLY LONG TO PRODUCE ELEONGATED SINGLE-DOMAIN MAGNETIC PARTICLES FROM AN ELECTROLYTE COMPRISING IONS SELECTED FROM THE CLASS CONSISTING OF IRON IONS, COBALT IONS, NICKEL IONS AND COMBINATIONS THEROF, WHILE MAINTAINING A QUIESCENT INTERFACE BETWEEN THE CATHOD AND THE ELCTROLYTE, THE IMPROVEMENT WHICH COMPRISES PROGRESSIVELY LOWERING THE CATHODE CURRENT DENSITY DURING A MAJOR PORTION OF THE ELECTROPDEPOSITON CYCLE WITHIN THE RANGE FROM A MAXIMUM OF 5 AMPS./CM.2 TO A MINIMUM OF 0.001 AMP./ CM.2 TO MAINTAIN A SUBSTANTIALLY CONSTANT MAXIMUM COERCIVE FORCE IN THE ELECTRODEPOSITED PARTICLES.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |