Patent US2576456A successfully refreshed from Google Patents.
US2576456A
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Materials of high magnetic permeability
Assignee: RCA Corp
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Filing: 1946-12-31
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Granted: 1951-11-27
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Expires: 1966-12-31
Abstract
No abstract record available.
Inventors
- 👤 Robert L Harvey
- 👤 Humboldt W Leverenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683; H; H01; H01F; H01F21/00; H01F21/02; H01F21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A COMPOSITION OF MATTER COMPRISING THE REACTION PRODUCT PRODUCED BY HEATING TOGETHER AT TEMPERATURES EXCEEDING 950* C. IN AN OXYGENCONTAINING OXIDIZING ATMOSPHERE AN INTIMATE MIXTURE OF FE2O3, MGO AND AT LEAST ONE OXIDE OF A TRIVALENT METAL FROM THE CLASS CONSISTING OF ALUMINUM, GALLIUM AND GADOLINIUM IN WHICH THE MOLAR RATIO OF FEO3 AND MGO IS FROM 2FE2O3.MGO TO FE2O3.2MGO AND THE PROPORTION OF SAID TRIVALENT METAL OXIDE IS FROM .0025 TO ABOUT 0.1 MOLE PER MOLE OF FE2O3.
Claim 2
Dependent Claim
79 words
A COMPOSITION OF MATTER COMPRISING THE REACTION PRODUCT PRODUCED BY HEATING TOGETHER AT TEMPERATURES EXCEEDING 950* C. IN AN OXYGENCONTAINING OXIDIZING ATMOSPHERE AN INTIMATE MIXTURE OF FE2O3, MGO AND AT LEAST ONE OXIDE OF A TRIVALENT METAL FROM THE CLASS CONSISTING OF ALUMINUM, GALLIUM AND GADOLINIUM IN WHICH THE MOLAR RATIO OF FEO3 AND MGO IS FROM 2FE2O3.MGO TO FE2O3.2MGO AND THE PROPORTION OF SAID TRIVALENT METAL OXIDE IS FROM .0025 TO ABOUT 0.1 MOLE PER MOLE OF FE2O3.
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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |