Patent US4060476A successfully refreshed from Google Patents.
US4060476A
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Anode for electrochemical processes
Assignee: BASF SE
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Filing: 1975-12-15
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Granted: 1977-11-29
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Expires: 1995-12-15
Abstract
Abstract An anode for electrochemical processes consists of an electrode base plate of a metal which can be passivated electrochemically, a protective layer deposited thereon, and a further layer, consisting of manganese dioxide. The protective layer consists of the nitride of the metal of the electrode base plate.
Inventors
- 👤 Wolfram Treptow
- 👤 Gerd Wunsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:58
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/054
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
An anode suitable for use in electrochemical process and comprising an electrode base plate made of a metal which can be passivated electrochemically, a protective layer of the nitride of the metal of the electrode base plate applied thereto, and a layer containing manganese dioxide as electrochemically active material and overlying the protective layer, said last-mentioned layer having been produced by applying over the protective nitride layer of the electrode base plate a thermally decomposable manganese salt and decomposing said salt to form manganese dioxide by rapidly bringing the salt, after its application over the protective nitride layer, to its decomposition temperature in a period of less than 60 seconds.
Claim 2
Dependent Claim
110 words
An anode suitable for use in electrochemical process and comprising an electrode base plate made of a metal which can be passivated electrochemically, a protective layer of the nitride of the metal of the electrode base plate applied thereto, and a layer containing manganese dioxide as electrochemically active material and overlying the protective layer, said last-mentioned layer having been produced by applying over the protective nitride layer of the electrode base plate a thermally decomposable manganese salt and decomposing said salt to form manganese dioxide by rapidly bringing the salt, after its application over the protective nitride layer, to its decomposition temperature in a period of less than 60 seconds.
Claim 3
Dependent Claim
32 words
An anode as claimed in claim 1 wherein the electrode base plate is made of titanium or of an alloy of titanium with one or more other metals which can be passivated.
Claim 4
Dependent Claim
19 words
An anode as claimed in claim 1 wherein the protective layer has a thickness of from 1 to 10μ.
Claim 5
Dependent Claim
20 words
An anode as claimed in claim 1 wherein the manganese dioxide layer has a thickness of from 10 to 40μ.
Claim 6
Dependent Claim
48 words
An anode as claimed in claim 1 wherein the electrode base plate is made of titanium or of an alloy of titanium with one or more other metals which can be passivated, which other metals are selected from the group consisting of zirconium, hafnium, vanadium, niobium and tantalum.
Claim 7
Dependent Claim
15 words
An anode as claimed in claim 1 wherein said period is less than 30 seconds.
Claim 8
Dependent Claim
30 words
An anode as claimed in claim 1 wherein said manganese salt is the formate, acetate, oxalate, sulfate, sulfide, carbonate or nitrate of a divalent manganese or a manganese (II) halide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |