Patent US4295943A successfully refreshed from Google Patents.
US4295943A
Expired / Lapsed
US
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Process for the electrolytic production of manganese dioxide
Assignee: Eltech Systems Corp
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Filing: 1980-04-17
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Granted: 1981-10-20
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Expires: 2000-04-17
Abstract
Abstract In a process for the production of manganese dioxide comprising electrodepositing manganese dioxide from an aqueous manganese containing electrolyte on to an anode and removing the manganese dioxide from the anode, the improvement comprising using a flexible material as the anode and flexing the anode to fracture and remove the manganese dioxde deposit.
Inventors
- 👤 Nenad R. Tomov
- 👤 Geoffrey M. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:56
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/21
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
53 words
A process for the electrolytic production of manganese dioxide comprising electrolyzing an aqueous manganese containing electrolyte between a flexible anode and a cathode to deposit manganese dioxide on the anode, flexing the anode to fracture and remove the manganese dioxide deposit and recovering the manganese dioxide without removing the anode from the cell.
Claim 2
Dependent Claim
53 words
A process for the electrolytic production of manganese dioxide comprising electrolyzing an aqueous manganese containing electrolyte between a flexible anode and a cathode to deposit manganese dioxide on the anode, flexing the anode to fracture and remove the manganese dioxide deposit and recovering the manganese dioxide without removing the anode from the cell.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the manganese dioxide deposit is between 100 to 2000 microns thick at the time of flexing.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein the concentration of Mn 2+ is 55 to 100 g/l.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein the current density is 75 to 350 A/m 2 and the electrolyte temperature is 85° to 98° C.
Claim 6
Dependent Claim
71 words
In a process for the production of manganese dioxide comprising electrodepositing manganese dioxide from an aqueous manganese containing electrolyte on to an anode and removing the manganese dioxide from the anode, the improvement comprising using a flexible material as the anode and the anode surface is provided with a plurality of grooves and flexing the anode to fracture and remove the manganese dioxide deposit without removing the anode from the cell.
Claim 7
Dependent Claim
71 words
In a process for the production of manganese dioxide comprising electrodepositing manganese dioxide from an aqueous manganese containing electrolyte on to an anode and removing the manganese dioxide from the anode, the improvement comprising using a flexible material as the anode and the anode surface is provided with a plurality of grooves and flexing the anode to fracture and remove the manganese dioxide deposit without removing the anode from the cell.
Claim 8
Dependent Claim
10 words
The process of claim 5 wherein the grooves are horizontal.
Claim 9
Dependent Claim
10 words
The process of claim 5 wherein the grooves are vertical.
Claim 10
Dependent Claim
22 words
The process of claim 5 wherein the manganese dioxide deposit is between 100 and 2000 microns thick at the time of flexing.
References Cited (Backward Citations)
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Cited
US2392614A
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US3414486A
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US3419901A
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US3855088A
Cited
US4170527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |