US3878083A
Expired / Lapsed
US
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Anode for oxygen evolution
Assignee: ELECTRODE Corp A DE CORP
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Filing: 1973-05-17
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Granted: 1975-04-15
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Expires: 1993-05-17
Abstract
Abstract Novel electrode for oxygen evolution comprising an electroconductive base provided with an outer coating containing a mixed material of tantalum oxide and iridium oxide and preparation and use thereof.
Inventors
- 👤 Nora Oronzio De
- 👤 Giuseppe Bianchi
- 👤 Antonio Nidola
- 👤 Giovanni Trisoglio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:21
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/02; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/055; C25B11/057; C25B11/061; C25B11/063; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
46 words
AN ELECTRODE COMPRISING AN ELECTROCONDUCTIVE BASE PROVIDED WITH A COATING OVER AT LEAST A PORTION OF ITS OUTER SURFACE OF A MIXED MATERIAL OF TANTALUM OXIDE AND IRIDIUM OXIDE, IN WHICH THE RATIO OF TANTALUM TO IRIDIUM CALCULATED AS METAL IS 1:1 TO 0.34 TO 1.
Claim 2
Dependent Claim
46 words
AN ELECTRODE COMPRISING AN ELECTROCONDUCTIVE BASE PROVIDED WITH A COATING OVER AT LEAST A PORTION OF ITS OUTER SURFACE OF A MIXED MATERIAL OF TANTALUM OXIDE AND IRIDIUM OXIDE, IN WHICH THE RATIO OF TANTALUM TO IRIDIUM CALCULATED AS METAL IS 1:1 TO 0.34 TO 1.
Claim 3
Dependent Claim
13 words
The electrode of claim 1 wherein the said base is a valve metal.
Claim 4
Dependent Claim
25 words
The electrode of claim 1 wherein the said base is an alloy of a valve metal and at least one of the platinum group metals.
Claim 5
Dependent Claim
11 words
The electrode of claim 2 wherein the valve metal is titanium.
Claim 6
Dependent Claim
18 words
The electrode of claim 1 wherein the said base is an alloy containing at least two valve metals.
Claim 7
Dependent Claim
27 words
The electrode of claim 1 wherein the said base is an alloy containing at least two valve metals and at least one of the platinum group metals.
Claim 8
Dependent Claim
21 words
The electrode of claim 1 wherein the base is an alloy of titanium containing up to 0.2% by weight of palladium.
Claim 9
Dependent Claim
52 words
An electrode comprising a base of titanium alloyed with up to 0.2% by weight of palladium provided with a coating over 50 to 100% of the base of a mixed material of tantalum oxide and iridium oxide, the ratio of tantalum to iridium calculated as metal being 1:1 to 0.34 to 1.
Claim 10
Dependent Claim
52 words
An electrode comprising a base of titanium alloyed with up to 0.2% by weight of palladium provided with a coating over 50 to 100% of the base of a mixed material of tantalum oxide and iridium oxide, the ratio of tantalum to iridium calculated as metal being 1:1 to 0.34 to 1.
Claim 11
Dependent Claim
79 words
An electrode comprising an electroconductive base provided with a coating over at least a portion of its outer surface of a mixed material of tantalum oxide and iridium oxide, in which the ratio of the tantalum to the iridium calculated as metal is 1:1 to 0.34 to 1, said coating further contains 0.1 to 5.0% by weight of an oxide of a metal selected from the group consisting of alkaline earth metals, cobalt, iron, nickel, chromium, molybdenum and manganese.
Claim 12
Dependent Claim
79 words
An electrode comprising an electroconductive base provided with a coating over at least a portion of its outer surface of a mixed material of tantalum oxide and iridium oxide, in which the ratio of the tantalum to the iridium calculated as metal is 1:1 to 0.34 to 1, said coating further contains 0.1 to 5.0% by weight of an oxide of a metal selected from the group consisting of alkaline earth metals, cobalt, iron, nickel, chromium, molybdenum and manganese.
Claim 13
Dependent Claim
21 words
An electrode of claim 9 wherein the metal is selected from the group consisting of cobalt and an alkaline earth metal.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |