US4108745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selenium-containing coating for valve metal electrodes and use
Assignee: Honeywell International Inc
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Filing: 1977-04-11
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Granted: 1978-08-22
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Expires: 1997-04-11
Abstract
Abstract Metal electrodes having a conductive coating comprising one or more elements of the platinum group, in metallic or oxidized form, together with selenium in oxidized form have enhanced catalytic activity for oxygen evolution in both acidic and alkaline media.
Inventors
- 👤 Divna Cipris
- 👤 Dirk Pouli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:50
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
17 words
In the process for a electrolytically generating oxygen by passing an electrical current through an acidic or
Claim 2
Dependent Claim
17 words
In the process for a electrolytically generating oxygen by passing an electrical current through an acidic or
Claim 3
Dependent Claim
16 words
The improvement of claim 1 wherein the metallic base of the electrode is composed of titanium.
Claim 4
Dependent Claim
31 words
The improvement of claim 2 wherein in the coating of the electrode the elements of the platinum group are selected from the group consisting of platinum, iridium, ruthenium and mixtures thereof.
Claim 5
Dependent Claim
25 words
The improvement of claim 3 wherein in the coating of the electrode the elements of the platinum group are a mixture of platinum and iridium.
Claim 6
Dependent Claim
20 words
The improvement of claim 3 wherein in the coating of the electrode the element of the platinum group is iridium.
Claim 7
Dependent Claim
12 words
The improvement of claim 1 wherein the electrolyte is an acidic electrolyte.
Claim 8
Dependent Claim
12 words
The improvement of claim 1 wherein the electrolyte is a basic electrolyte.
Claim 9
Dependent Claim
26 words
The improvement of claim 1 wherein the metallic base of the electrode comprises a metal selected from the group consisting of titanium, tantalum and mixtures thereof.
Claim 10
Dependent Claim
63 words
An electrode for use in electrochemical processes comprising: (a) a metallic base comprising a metal selected from the group consisting of titanium, tantalum, niobium, tungsten, zirconium, molybdenum, bismuth, and mixtures thereof; having deposited thereon and in direct contact therewith (b) a conductive coating comprising one or more elements of the platinum group, in metallic or oxidized form, together with selenium in oxidized form.
Claim 11
Dependent Claim
63 words
An electrode for use in electrochemical processes comprising: (a) a metallic base comprising a metal selected from the group consisting of titanium, tantalum, niobium, tungsten, zirconium, molybdenum, bismuth, and mixtures thereof; having deposited thereon and in direct contact therewith (b) a conductive coating comprising one or more elements of the platinum group, in metallic or oxidized form, together with selenium in oxidized form.
Claim 12
Dependent Claim
24 words
An electrode according to claim 9 wherein the metallic base comprises a metal selected from the group consisting of titanium, tantalum, and mixtures thereof.
Claim 13
Dependent Claim
14 words
An electrode according to claim 10 wherein the metallic base is composed of titanium.
Claim 14
Dependent Claim
29 words
An electrode according to claim 11 wherein in the coating the elements of the platinum group are selected from the group consisting of platinum, iridium, ruthenium, and mixtures thereof.
Claim 15
Dependent Claim
23 words
An electrode according to claim 12 wherein in the coating the elements of the platinum group are a mixture of platinum and iridium.
Claim 16
Dependent Claim
20 words
An electrode according to claim 12 wherein the elements of the platinum group are a mixture of platinum and ruthenium.
Claim 17
Dependent Claim
15 words
An electrode according to claim 12 wherein the element of the platinum group is iridium.
Claim 18
Dependent Claim
21 words
An electrode according to claim 15 wherein metallic base is composed of a copper core covered by a layer of titanium.
Claim 19
Dependent Claim
33 words
An electrode according to claim 9 wherein the metallic base is composed of a core of a metal selected from the group consisting of copper and silver, covered by a layer of titanium.
Claim 20
Dependent Claim
21 words
An electrode according to claim 17 wherein the metallic base is composed of copper core covered by a layer of titanium.
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) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |