US3770613A
Expired / Lapsed
US
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Novel electrode
Assignee: NORA INT CO
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Filing: 1971-01-06
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Granted: 1973-11-06
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Expires: 1991-01-06
Abstract
Abstract Novel electrodes are described having an electroconductive base and a coating applied to the base. The coating consists of the sulfides, nitrides, borides and carbides of the elements aluminum, tantalum, titanium, bismuth, tungsten, zirconium and hafnium mixed with the metals, oxides, sulfides, nitrides, borides and carbides of the elements gold, silver, platinum, palladium, ruthenium, rhodium, iridium, osmium, nickel, chromium, lead, copper and manganese. The use of the novel electrodes in alkali metal chlorine cells, both diaphragm and mercury type, alkali metal chlorate cells and other similar electrolytic applications is disclosed.
Inventors
- 👤 R Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:35
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/055; C25B11/073; C25B11/091; C25B11/02; C25B11/03; C25B11/031; C25B11/057; C25B11/065
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
17 words
The electrode of claim 1 wherein the electrically conductive mixture is a titanium sulfide and ruthenium oxide.
Claim 2
Dependent Claim
16 words
The electrode of claim 1 wherein the electrically conductive mixture is a titanium sulfide and platinum.
Claim 3
Dependent Claim
31 words
The electrode of claim 1 wherein the electrically conductive mixture is ruthenium oxide and at least one member of the group consisting of the nitrides, carbides, sulfides and borides of titanium.
Claim 4
Dependent Claim
53 words
The electrode of claim 1 wherein the electrically conductive mixture is a mixture of titanium sulfide and at least one member of the group consisting of palladium, platinum, rhodium, iridium, ruthenium, osmium, silver, gold, iron, nickel, chromium, lead, copper and manganese, said member being present as metals, oxides, borides, nitrides, carbides or sulfides.
Claim 5
Dependent Claim
13 words
The electrode of claim 1, wherein the electrically conductive mixture comprises titanium sulfide.
Claim 6
Dependent Claim
13 words
The electrode of claim 6 wherein the electrically conductive mixture comprises ruthenium oxide.
Claim 7
Dependent Claim
12 words
The electrode of claim 6 wherein the electrically conductive mixture comprises platinum.
Claim 8
Dependent Claim
28 words
The electrode of claim 1 wherein the electrically conductive mixture comprises at least one member consisting of a sulfide, boride, nitride, or carbide of titanium, and ruthenium dioxide.
Claim 9
Dependent Claim
98 words
An electrode suitable for eleCtrolysis comprising hydrophobic carbonaceous base having affixed thereto an electrolytically conductive mixture comprising at least one member of a first group consisting of aluminum, tantalum, titanium, hafnium, zirconium, bismuth, and tungsten, the member of said first group being present as a sulfide, nitride, boride, or carbide, and at least one member of a second group consisting of palladium, platinum, rhodium, iridium, ruthenium, osmium, silver, gold, iron, nickel, chromium, lead, copper, and manganese, the member of said second group being present in one or more of the following forms--metal, oxide, boride, nitride, sulfide, or carbide.
Claim 10
Dependent Claim
12 words
The electrode of claim 10 wherein the hydrophobic carbonaceous base is graphite.
Claim 11
Dependent Claim
16 words
The electrode of claim 11 wherein the electrically conductive mixture comprises titanium, sulfide, and ruthenium oxide.
Claim 12
Dependent Claim
55 words
The electrode of claim 11 wherein the electrically conductive mixture is titanium sulfide and a member of the group consisting of palladium, platinum, rhodium, iridium, ruthenium, osmium, silver, gold, iron, nickel, chromium, lead, copper, and manganese, the said member being present in one or more of the following forms--metal, oxide, boride, nitride, sulfide, or carbide.
Claim 13
Dependent Claim
46 words
An anode for electrolysis of an aqueous solution of an alkali metal chloride which comprises a porous electroconductive carbon base having an exterior surface comprising an electroconductive metal or metal compound, the pores of said base adjacent said surface having disposed thereon an inert hydrophobic sealant.
Claim 14
Dependent Claim
35 words
An anode for the electrolysis of brines comprised of a corrosion-resistant valve metal substrate and a thin, adherent coating consisting essentially of ruthenium oxide and a carbide, said carbide being inert to the electrolysis environment.
Claim 15
Dependent Claim
11 words
An anode of claim 15 wherein the carbide is tungsten carbide.
Claim 16
Dependent Claim
27 words
An anode of claim 15 wherein the carbide is a compound of at least one of the elements selected from the group tantalum, titanium, tungsten, and hafnium.
Claim 17
Dependent Claim
21 words
An anode of claim 17 wherein the substrate is chosen from the group consisting of titanium, tantalum, zirconium, hafnium, and tungsten.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |