Patent US2549089A successfully refreshed from Google Patents.
US2549089A
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Mixed ferrite compositions, including lithium ferrite
Assignee: RCA Corp
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Filing: 1948-12-15
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Granted: 1951-04-17
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Expires: 1968-12-15
Abstract
No abstract record available.
Inventors
- 👤 Imre J Hegyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2616
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A CUBIC CRYSTALLINE FERRITE MATERIAL CONSISTING ESSENTIALLY OF THE REACTION PRODUCT PRODUCED BY HEATING TOGETHER IN A NON-REDUCING ATMOSPHERE AT TEMPERATURES OF FROM ABOUT 900* C. TO ABOUT 1500* C. FOR FROM ABOUT 1 MINUTE TO ABOUT 6 HOURS AN INTIMATE MIXTURE OF ABOUT 30 TO ABOUT 70 MOLE PER CENT FE2O3, ABOUT 0.01 TO ABOUT 32.5 MOLE PER CENT LI2O, ABOUT 2.5 TO ABOUT 30 MOLE PER CENT OF AT LEAST ONE OXIDE FROM THE CLASS CONSISTING OF ZNO AND CDO AND ABOUT 10 TO ABOUT 42.5 MOLE PER CENT OF MNO2.
Claim 2
Dependent Claim
93 words
A CUBIC CRYSTALLINE FERRITE MATERIAL CONSISTING ESSENTIALLY OF THE REACTION PRODUCT PRODUCED BY HEATING TOGETHER IN A NON-REDUCING ATMOSPHERE AT TEMPERATURES OF FROM ABOUT 900* C. TO ABOUT 1500* C. FOR FROM ABOUT 1 MINUTE TO ABOUT 6 HOURS AN INTIMATE MIXTURE OF ABOUT 30 TO ABOUT 70 MOLE PER CENT FE2O3, ABOUT 0.01 TO ABOUT 32.5 MOLE PER CENT LI2O, ABOUT 2.5 TO ABOUT 30 MOLE PER CENT OF AT LEAST ONE OXIDE FROM THE CLASS CONSISTING OF ZNO AND CDO AND ABOUT 10 TO ABOUT 42.5 MOLE PER CENT OF MNO2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |