Patent US2777745A successfully refreshed from Google Patents.
US3767780A
Expired / Lapsed
US
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Preparation of manganese oxides
Assignee: Eastman Kodak Co
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Filing: 1972-02-03
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Granted: 1973-10-23
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Expires: 1992-02-03
Abstract
Abstract A PROCESS FOR PREPARING MANGANIC-MANGANOUS OXIDE (MN3O4) BY THE OXIDATION IN WATER OF MANGANOUS HYDROXIDE AT ELEVATED TEMPERATURE AND S UPERATMOSPHERIC PRESSURE. THE WATER CAN CONTAIN AMMONIA, A CETIC ACID, OR AMMONIUM ACETATE. THE TEMPERATURE C AN BE BETWEEN ABOUT 100C. AND ABOUT 140*C., AND THE PRESSURE CAN BE BETWEEN ABOUT 40 AND 70 P.S.I. AIR OR OXYGEN CAN BE USED AS THE OXIDIZING AGENT, AND THE SUSPENSION OF MANGANOUS HYDROXIDE IN WATER OR AQUEOUS SOLUTION CAN BE AGITATED DURING TREATMENT. THE RESULTING MANGANIC MANGANOUS OXIDE CAN BE RECOVERED AS FILTER CAKE AFTER FILTRATION OF THE REACTION MIXTURE.
Inventors
- 👤 M Bellas
- 👤 W Seddon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:21
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/02; C01G45/028; C01P; C01P2006/00; C01P2006/80
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |