US3455798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the electrolytic production of manganese dioxide with frequent replacement of smooth anodes
Assignee: Knapsack AG
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Filing: 1966-11-17
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Granted: 1969-07-15
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Expires: 1986-11-17
Abstract
No abstract record available.
Inventors
- 👤 Arthur Mehne
- 👤 Heinz Harnisch
- 👤 Herbert Diskowski
- 👤 Friedrich-Karl Frorath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:05
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/21; C25B11/00; C25B11/04; C25B11/042; C25B11/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN THE PROCESS FOR THE ELECTROLYTIC PRODUCTION OF MANGANESE DIOXIDE BY SUBJECTING A MANGANOUS SALT DISSOLVED IN A SULFURIC ACID SOLUTION TO ANODIC OXIDATION WITH THE USE OF LEAD-ALLOY ANODES, THE IMPROVEMENT WHICH COMPRISES REPLACING THE ANODES, AFTER SINGLE TO THREETIMES REPEATED USE THEREOF IN AN ELECTROLYSIS CARRIED OUT OVER A PERIOD OF 7 TO 40 DAYS, WITH FRESH ANODES.
Claim 2
Dependent Claim
60 words
IN THE PROCESS FOR THE ELECTROLYTIC PRODUCTION OF MANGANESE DIOXIDE BY SUBJECTING A MANGANOUS SALT DISSOLVED IN A SULFURIC ACID SOLUTION TO ANODIC OXIDATION WITH THE USE OF LEAD-ALLOY ANODES, THE IMPROVEMENT WHICH COMPRISES REPLACING THE ANODES, AFTER SINGLE TO THREETIMES REPEATED USE THEREOF IN AN ELECTROLYSIS CARRIED OUT OVER A PERIOD OF 7 TO 40 DAYS, WITH FRESH ANODES.
References Cited (Backward Citations)
US2424958A
Cited
GB977569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |