Patent US5396267A successfully refreshed from Google Patents.
Patent US2579267A successfully refreshed from Google Patents.
US2579267A
Expired / Lapsed
US
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Material having improved magnetic property
Assignee: RCA Corp
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Filing: 1947-12-31
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Granted: 1951-12-18
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Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 Humboldt W Leverenz
- 👤 Imre J Hegyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:08
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COMPOSITION OF MATTER COMPRISING THE REACTION PRODUCT PRODUCED BY HEATING TOGETHER IN A NON-REDUCING ATMOSPHERE AT TEMPERATURE OF 900* C. TO 1500* C. FOR 1 MINUTE TO 5 HOURS AN INTIMATE MIXTURE OF FROM 30 TO 70 MOLE PERCENT FE2O3, 0.2 TO 50 MOLE PERCENT BEO, AND THE REMAINDER COMPRISING AT LEAST 20 MOLE PERCENT ONE OTHER OXIDE FROM THE CLASS CONSISTING OF THE OXIDES OF MANGANESE, ZINC, MAGNESIUM, NICKEL, CADMIUM AND COPPER.
Claim 2
Dependent Claim
74 words
A COMPOSITION OF MATTER COMPRISING THE REACTION PRODUCT PRODUCED BY HEATING TOGETHER IN A NON-REDUCING ATMOSPHERE AT TEMPERATURE OF 900* C. TO 1500* C. FOR 1 MINUTE TO 5 HOURS AN INTIMATE MIXTURE OF FROM 30 TO 70 MOLE PERCENT FE2O3, 0.2 TO 50 MOLE PERCENT BEO, AND THE REMAINDER COMPRISING AT LEAST 20 MOLE PERCENT ONE OTHER OXIDE FROM THE CLASS CONSISTING OF THE OXIDES OF MANGANESE, ZINC, MAGNESIUM, NICKEL, CADMIUM AND COPPER.
References Cited (Backward Citations)
US1976230A
Cited
US1946964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |