Patent US2924516A successfully refreshed from Google Patents.
Patent US3810973A successfully refreshed from Google Patents.
US3810973A
Expired / Lapsed
US
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Method of preparing ferrites
Assignee: General Electric Co
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Filing: 1973-01-12
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Granted: 1974-05-14
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Expires: 1993-01-12
Abstract
Abstract A METHOD OF MAKING A MAGNETOPLUMBITE FERRIC CHLORRIDE IS VIDED WHEREIN AN AQUEOUS SOLUTION OF FERRIC CHLORIDE IS REACTED WITH AN ALKALI METAL HYDROXIDE TO FORM FERRIC OXIDE HYDRATE IN A SALT SOLUTION, AND THEN AN ALKALINE EARTH METAL CARBONATE IS ADDED TO THE MIXTURE. AFTER DRYING, THE FERRIC OXIDE AND THE ALKALINE EARTH METAL EARTH METAL CARBONATE ARE REACTED IN A MOLTEN SALT SOLVENT AND THE PARTICULATE FERRITE IS RECOVERED.
Inventors
- 👤 R Arendt
- 👤 C Vanburen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:38
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/10; H01F1/11; C; C01; C01G; C01G49/00; C01G49/0018; C01G49/0036; C01P; C01P2004/00; C01P2004/20; C01P2004/22; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/42
Claims Analysis
Total Claims: 0
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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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |