Patent US2770523A successfully refreshed from Google Patents.
US2770523A
Expired / Lapsed
US
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Ferro-magnetic cobalt and nickel manganese oxides having the ilmenite-type crystal structure
Assignee: EIDP Inc
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Filing: 1954-08-26
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Granted: 1956-11-13
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Expires: 1974-08-26
Abstract
No abstract record available.
Inventors
- 👤 Richard C Toole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0311; H01F1/0313; H01F1/0317
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
THE CRYSTALLINE FORM OF A COMPLEX OXIDE OF MANGANESE, CORRESPONDING TO THE FORMULA MMNO3 WHEREIN M IS A GROUP VIII METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL, CHARACTERIZED BY HAVING A CRYSTAL STRUCTURE OF THE ILMENITE-TYPE AND BY BEING FERROMAGNETIC.
Claim 2
Dependent Claim
43 words
THE CRYSTALLINE FORM OF A COMPLEX OXIDE OF MANGANESE, CORRESPONDING TO THE FORMULA MMNO3 WHEREIN M IS A GROUP VIII METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL, CHARACTERIZED BY HAVING A CRYSTAL STRUCTURE OF THE ILMENITE-TYPE AND BY BEING FERROMAGNETIC.
Claim 3
Dependent Claim
84 words
PROCESS FOR PREPARING A FERROMAGNESTIC CRYSTALLINE COMPLEX OXIDE OF MANGANESE WHICH COMPRISES HEATING A MIXTURE OF MANGANESE DIOXIDE AND A SIMPLE OXIDE OF A METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL AT A TEMPERATURE OF AT LEAST 500* C., AND UNDER A PRESSURE OF AT LEAST 1000 ATMOSPHERES, AND SEPARATING AS THE RESULTING PRODUCT A CRYSTALLINE COMPLEX OXIDE OF MANGNAESE AND A METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL WHICH HAS THE ILMENITE-TYPE CRYSTAL STURCTURE AND IS FERROMAGNETIC.
Claim 4
Dependent Claim
84 words
PROCESS FOR PREPARING A FERROMAGNESTIC CRYSTALLINE COMPLEX OXIDE OF MANGANESE WHICH COMPRISES HEATING A MIXTURE OF MANGANESE DIOXIDE AND A SIMPLE OXIDE OF A METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL AT A TEMPERATURE OF AT LEAST 500* C., AND UNDER A PRESSURE OF AT LEAST 1000 ATMOSPHERES, AND SEPARATING AS THE RESULTING PRODUCT A CRYSTALLINE COMPLEX OXIDE OF MANGNAESE AND A METAL SELECTED FROM THE CLASS CONSISTING OF COBALT AND NICKEL WHICH HAS THE ILMENITE-TYPE CRYSTAL STURCTURE AND IS FERROMAGNETIC.
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |