Patent US3950240A successfully refreshed from Google Patents.
US3950240A
Expired / Lapsed
US
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Anode for electrolytic processes
Assignee: Occidental Chemical Corp
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Filing: 1975-05-05
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Granted: 1976-04-13
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Expires: 1995-05-05
Abstract
Abstract An electrode useful as an anode for the electrolysis of aqueous solutions of ionizable chemical compounds, and especially the electrolysis of brines comprises an electroconductive substrate, such as a valve metal having a coating thereon of electroconductive tin oxide containing about 0.1 to about 15 mole percent of niobium based on the moles of tin. An additional electrocatalytic phase may be present as a minor component of the tin oxide coating and/or as a coating thereon.
Inventors
- 👤 Arthur S. Cookfair
- 👤 Donald E. Stephens
- 👤 Tilak V. Bommaraju
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:23
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
49 words
An electrode comprising an electroconductive substrate and a coating thereon of tin oxide containing as a doping agent niobium in the amount of about 0.1 to about 15 mole percent based on the moles of tin and having an electrocatalytic material present at the outer surface of said coating.
Claim 2
Dependent Claim
49 words
An electrode comprising an electroconductive substrate and a coating thereon of tin oxide containing as a doping agent niobium in the amount of about 0.1 to about 15 mole percent based on the moles of tin and having an electrocatalytic material present at the outer surface of said coating.
Claim 3
Dependent Claim
13 words
An electrode according to claim 1 wherein the substrate is a valve metal.
Claim 4
Dependent Claim
11 words
An electrode according to claim 2 wherein the substrate is titanium.
Claim 5
Dependent Claim
30 words
An electrode according to claim 3 containing as a component of said coating up to about 20 mole percent of a noble metal oxide, based on the moles of tin.
Claim 6
Dependent Claim
14 words
An electrode according to claim 4 wherein said noble metal oxide is ruthenium oxide.
Claim 7
Dependent Claim
32 words
An electrode according to claim 5 wherein the ruthenium oxide is present in said coating in an amount of about 0.1 to about 10 mole percent, based on the moles of tin.
Claim 8
Dependent Claim
44 words
An electrode according to claim 1 comprising an electroconductive substrate, a coating thereon of tin oxide containing about 0.1 to about 15 mole percent of niobium, based on the moles of tin, and an outer coating of a noble metal or noble metal oxide.
Claim 9
Dependent Claim
15 words
An electrode according to claim 7 wherein the outer coating is a noble metal oxide.
Claim 10
Dependent Claim
13 words
An electrode according to claim 8 wherein the outer coating is ruthenium oxide.
Claim 11
Dependent Claim
13 words
An electrode according to claim 9 wherein the substrate is a valve metal.
Claim 12
Dependent Claim
11 words
An electrode according to claim 10 wherein the substrate is titanium.
Claim 13
Dependent Claim
55 words
An electrode according to claim 1 comprising an electroconductive substrate, a coating thereon of tin oxide containing about 0.1 to about 15 mole percent of niobium and up to about 20 mole percent of a noble metal oxide, based on moles of tin, and an outer coating of a noble metal or noble metal oxide.
Claim 14
Dependent Claim
15 words
An electrode according to claim 12 wherein said outer coating is a noble metal oxide.
Claim 15
Dependent Claim
13 words
An electrode according to claim 13 wherein said outer coating is ruthenium oxide.
Claim 16
Dependent Claim
28 words
An electrode according to claim 14 wherein said coating of tin oxide contains about 0.1 to about 10 mole percent of ruthenium oxide based on moles of tin.
Claim 17
Dependent Claim
13 words
An electrode according to claim 15 wherein said substrate is a valve metal.
Claim 18
Dependent Claim
11 words
An electrode according to claim 16 wherein said substrate is titanium.
References Cited (Backward Citations)
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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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |