US2956860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing manganese dioxide
Assignee: Manganese Chemicals Corp
•
Filing: 1957-04-11
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Granted: 1960-10-18
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Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 Jay Y Welsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:21
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/02; C01G45/024; H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; C01P; C01P2006/00; C01P2006/40; C01P2006/80; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN THE PROCESS OF PRODUCING MANGANESE DIOXIDE BY REACTING A SOLUTION OF MAGANESE SULFATE WITH ALKALI METAL CHLORATE IN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH CONSISTS IN EFFECTING THE REACTION, AT AN ELEVATED TEMPERATURE OF FROM ABOUT 80* TO 95*C., IN THE PRESENCE OF A CATALYTICALLY EFFECTIVE AMOUNT OF A PARTICULATE MANGANESE DIOXIDE MATERIAL HAVING A CATALYTIC EFFECT ON THE REACTION, SAID CATALYTIC MATERIAL BEING SELECTED FROM THE GROUP OF MANGANESE DIOXIDE PRODUCTS CONSISTING OF (A) THE MANGANESE DIOXIDE PRODUCT PRODUCED BY ROASTING PRECIPITATED MANGANESE CARBONATE UNDER OXIDIZING CONDITIONS, AND (B) THE MANGANESE DIOXIDE PRODUCT PRODUCED BY LEACHING WITH SULPHURIC ACID AN OXIDE OF MANGANESE IN A LOWER STATE OF OXIDATION THAN MNO2 AND A HIGHER STATE OF OXIDATION THAN MNO.
Claim 2
Dependent Claim
120 words
IN THE PROCESS OF PRODUCING MANGANESE DIOXIDE BY REACTING A SOLUTION OF MAGANESE SULFATE WITH ALKALI METAL CHLORATE IN AQUEOUS MEDIUM, THE IMPROVEMENT WHICH CONSISTS IN EFFECTING THE REACTION, AT AN ELEVATED TEMPERATURE OF FROM ABOUT 80* TO 95*C., IN THE PRESENCE OF A CATALYTICALLY EFFECTIVE AMOUNT OF A PARTICULATE MANGANESE DIOXIDE MATERIAL HAVING A CATALYTIC EFFECT ON THE REACTION, SAID CATALYTIC MATERIAL BEING SELECTED FROM THE GROUP OF MANGANESE DIOXIDE PRODUCTS CONSISTING OF (A) THE MANGANESE DIOXIDE PRODUCT PRODUCED BY ROASTING PRECIPITATED MANGANESE CARBONATE UNDER OXIDIZING CONDITIONS, AND (B) THE MANGANESE DIOXIDE PRODUCT PRODUCED BY LEACHING WITH SULPHURIC ACID AN OXIDE OF MANGANESE IN A LOWER STATE OF OXIDATION THAN MNO2 AND A HIGHER STATE OF OXIDATION THAN MNO.
References Cited (Backward Citations)
US1178927A
Cited
US1330738A
Cited
US1275666A
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US1293461A
Cited
US1293463A
Cited
US2123250A
Cited
US2608466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |