US3969217A
Expired / Lapsed
US
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Electrolytic anode
Assignee: Occidental Chemical Corp
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Filing: 1974-10-07
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Granted: 1976-07-13
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Expires: 1994-10-07
Abstract
Abstract An improved electrode, useful as an anode for the electrolysis of brines comprises an electrically conductive substrate having adhered thereto and extending over at least a portion of the surface thereof, a coating of mixed oxides comprising about 10 to about 80 mole percent indium oxide and about 10 to about 90 mole percent of a platinum group metal oxide. Up to about 20 mole percent of tin oxide may be incorporated in the coating to lower the electrical resistivity thereof.
Inventors
- 👤 Tilak V. Bommaraju
- 👤 Donald E. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:49
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
An electrode which comprises an electrically conductive substrate having adhered thereto and extending over at least a portion of the surface thereof, a coating of mixed oxides comprising about 10 to about 80 mole percent indium oxide, and about 10 to about 90 mole percent of a platinum group metal oxide.
Claim 2
Dependent Claim
51 words
An electrode which comprises an electrically conductive substrate having adhered thereto and extending over at least a portion of the surface thereof, a coating of mixed oxides comprising about 10 to about 80 mole percent indium oxide, and about 10 to about 90 mole percent of a platinum group metal oxide.
Claim 3
Dependent Claim
15 words
An electrode according to claim 1 wherein the electrically conductive substrate is a valve metal.
Claim 4
Dependent Claim
13 words
An electrode according to claim 2 wherein the electrically conductive substrate is titanium.
Claim 5
Dependent Claim
15 words
An electrode according to claim 3 wherein the platinum group metal oxide is rhodium oxide.
Claim 6
Dependent Claim
24 words
An electrode according to claim 1 wherein the coating of mixed oxides includes from about 0.1 to about 20 mole percent of tin oxide.
Claim 7
Dependent Claim
43 words
An electrode according to claim 5 wherein the coating of mixed oxides consists essentially of about 60 to about 75 mole percent indium oxide, about 25 to about 40 mole percent rhodium oxide and about 0.1 to about 10 mole percent tin oxide.
Claim 8
Dependent Claim
13 words
An electrode according to claim 6 wherein the electrically conductive substrate is titanium.
Claim 9
Dependent Claim
39 words
An electrode according to claim 1 wherein the coating of mixed oxides comprises from about 25 to about 75 mole percent of indium oxide and from about 25 to about 75 mole percent of a platinum group metal oxide.
Claim 10
Dependent Claim
15 words
An electrode according to claim 8 wherein the platinum group metal oxide is rhodium oxide.
Claim 11
Dependent Claim
13 words
An electrode according to claim 9 wherein the electrically conductive substrate is titanium.
Claim 12
Dependent Claim
35 words
An electrode according to claim 10 wherein the coating of mixed oxides consists essentially of about 40 to about 60 mole percent indium oxide and about 40 to about 60 mole percent of rhodium oxide.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |