US2531445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of magnetic bodies from compressed powdered materials
Assignee: International Standard Electric Corp
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Filing: 1946-12-19
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Granted: 1950-11-28
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Expires: 1966-12-19
Abstract
No abstract record available.
Inventors
- 👤 Laycock William Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:41
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
METHOD OF MANUFACTURING A BODY HAVING LOW HYSTERESIS LOSS FACTOR FROM COMPRESSED INSULATED MAGNETIC PARTICLES OF HIGH PERMEABILITY WHICH COMPRISES FIRST INSULATING THE PARTICLES WITH A PRIMARY INSULATING LAYER CONSISTING OF AN ACID HYDROLYZED SILICON ESTER, SUBSEQUENTLY INSULATING THE PARTICLES WITH AT LEAST ONE FURTHER LAYER OF INSULATION COMPRISING AN INTERMEDIATE LAYER OF AT LEAST ONE SUBSTANCE CHOSEN FROM THE CLASS CONSISTING OF MAGNESIUM OXIDE AND MAGNESIUM HYDROXIDE, AND AN OUTERMOST LAYER COMPRISING TITANIUM DIOXIDE, COMPRESSING THE PARTICLES SO INSULATED INTO CORE FORM TO CAUSE PLASTIC DEFORMATION OF THE MAGNETIC PARTICLES AND THEN ANNEALING THE FINISHED CORE TO RECRYSTALLISE THE MAGNETIC PARTICLES.
Claim 2
Dependent Claim
102 words
METHOD OF MANUFACTURING A BODY HAVING LOW HYSTERESIS LOSS FACTOR FROM COMPRESSED INSULATED MAGNETIC PARTICLES OF HIGH PERMEABILITY WHICH COMPRISES FIRST INSULATING THE PARTICLES WITH A PRIMARY INSULATING LAYER CONSISTING OF AN ACID HYDROLYZED SILICON ESTER, SUBSEQUENTLY INSULATING THE PARTICLES WITH AT LEAST ONE FURTHER LAYER OF INSULATION COMPRISING AN INTERMEDIATE LAYER OF AT LEAST ONE SUBSTANCE CHOSEN FROM THE CLASS CONSISTING OF MAGNESIUM OXIDE AND MAGNESIUM HYDROXIDE, AND AN OUTERMOST LAYER COMPRISING TITANIUM DIOXIDE, COMPRESSING THE PARTICLES SO INSULATED INTO CORE FORM TO CAUSE PLASTIC DEFORMATION OF THE MAGNETIC PARTICLES AND THEN ANNEALING THE FINISHED CORE TO RECRYSTALLISE THE MAGNETIC 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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |