Patent US2822243A successfully refreshed from Google Patents.
US2822243A
Expired / Lapsed
US
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Process for producing manganese dioxide
Assignee: Individual
•
Filing: 1954-05-14
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Granted: 1958-02-04
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Expires: 1974-05-14
Abstract
No abstract record available.
Inventors
- 👤 Brix Aage Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:27
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/02; C01G45/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A METHOD FOR PRODUCING MANGANESE DIOXIDE CONSISTING OF THE STEPS OF: SUBJECTING A FINELY GROUND ORE CONTAINING MANGANESE DIOXIDE ALONG WITH IRON AND ALUMINUM CONSTITUENTS TO THE ACTION OF A DILUTE SULFURIC ACID SOLUTION CONTAINING HYDROGEN PEROXIDE TO REDUCE THE MANGANESE DIOXIDE IN ACCORD WITH THE EQUATION
Claim 2
Independent Claim
47 words
A METHOD FOR PRODUCING MANGANESE DIOXIDE CONSISTING OF THE STEPS OF: SUBJECTING A FINELY GROUND ORE CONTAINING MANGANESE DIOXIDE ALONG WITH IRON AND ALUMINUM CONSTITUENTS TO THE ACTION OF A DILUTE SULFURIC ACID SOLUTION CONTAINING HYDROGEN PEROXIDE TO REDUCE THE MANGANESE DIOXIDE IN ACCORD WITH THE EQUATION
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |