Patent US2681268A successfully refreshed from Google Patents.
US2681268A
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Process for the manufacture of manganese dioxide and depolarizers for electric cells
Assignee: Individual
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Filing: 1949-05-07
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Granted: 1954-06-15
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Expires: 1969-05-07
Abstract
No abstract record available.
Inventors
- 👤 Nossen Ernest Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:30
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; C; C01; C01G; C01G45/00; C01G45/02; C01G45/024; C25; C25B; C25B1/00; C25B1/01; C25B1/21; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR THE MANUFACTURE OF MANGANESE DIOXIDE, COMPRISING THE STEPS OF: REDUCING AN ORE CONTAINING MANGANESE INA FOUR-VALENT FORM TO A MANGANOUS MANGANITE BY SUBJECTING SAME TO HEAT AT A TEMPERATURE OF APPROXIMATELY 400-650* C. IN A REDUCING GAS, PRODUCING A FIRST HYDRATED MANGANESE DIOXIDE AND A MANGANESE NITRATE SOLUTION BY TREATING SAID REDUCED MANGANESE ORE WITH NITRIC ACID, SEPARATING SAID MANGANESE DIOXIDE AND SAID MANGANESE NITRATE SOLUTION FROM EACH OTHER, PRODUCING A SECOND MANGANESE DIOXIDE PRODUCT AND GASEOUS PRODUCTS BY DECOMPOSING SAID MANGANESE NITRATE SOLUTION BY SUBJECTING SAME TO HEAT AT A TEMPERATURE OF APPROXIMATELY 200-300* C., AND RECOVERING NITRIC ACID FROM SAID GASEOUS PRODUCTS BY REACTION WITH AN OXYGEN CONTAINING MEDIUM FOR RE-USE BY RECYCLING.
Claim 2
Dependent Claim
118 words
A PROCESS FOR THE MANUFACTURE OF MANGANESE DIOXIDE, COMPRISING THE STEPS OF: REDUCING AN ORE CONTAINING MANGANESE INA FOUR-VALENT FORM TO A MANGANOUS MANGANITE BY SUBJECTING SAME TO HEAT AT A TEMPERATURE OF APPROXIMATELY 400-650* C. IN A REDUCING GAS, PRODUCING A FIRST HYDRATED MANGANESE DIOXIDE AND A MANGANESE NITRATE SOLUTION BY TREATING SAID REDUCED MANGANESE ORE WITH NITRIC ACID, SEPARATING SAID MANGANESE DIOXIDE AND SAID MANGANESE NITRATE SOLUTION FROM EACH OTHER, PRODUCING A SECOND MANGANESE DIOXIDE PRODUCT AND GASEOUS PRODUCTS BY DECOMPOSING SAID MANGANESE NITRATE SOLUTION BY SUBJECTING SAME TO HEAT AT A TEMPERATURE OF APPROXIMATELY 200-300* C., AND RECOVERING NITRIC ACID FROM SAID GASEOUS PRODUCTS BY REACTION WITH AN OXYGEN CONTAINING MEDIUM FOR RE-USE BY RECYCLING.
References Cited (Backward Citations)
US1318891A
Cited
US1293461A
Cited
US1287041A
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US1761133A
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GB292991A
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CH138188A
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US2186929A
Cited
US2174570A
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US2374674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |