US3793443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing ferrites
Assignee: General Electric Co
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Filing: 1972-11-29
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Granted: 1974-02-19
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Expires: 1992-11-29
Abstract
Abstract A MAGNETOPLUMBITE FERRITE IN THE FORM OF MICRON- AND SUBMICRON-SIZE PARTICLES HAVING UNIQUE MAGNETIC PROPERTIES IS PREPARED BY REACTING CATION OXIDES OF THE FERRITE IN A SOLVENT OF NAC1-KC1 IN THE PRESENCE OF A SOURCE OF WATER.
Inventors
- 👤 R Arendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:12
CPC Classifications
C; C01; C01G; C01G49/00; C01G49/0018; C01G49/0036; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/10; H01F1/11; C01P; C01P2002/00; C01P2002/30; C01P2002/32; 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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |