Patent US3956083A successfully refreshed from Google Patents.
US3956083A
Expired / Lapsed
US
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Electrochemical anode and process using the anode
Assignee: Occidental Chemical Corp
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Filing: 1975-05-05
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Granted: 1976-05-11
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Expires: 1995-05-05
Abstract
Abstract An electrode for use in electrolytic processes, comprises a valve metal substrate, a coating thereon of conductive tin oxide containing a doping amount of tellurium, preferably up to about 0.3 mole percent of tellurium, based on moles of tin, and an outer coating of a noble metal or noble metal oxide.
Inventors
- 👤 Edward H. Cook, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:59
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
41 words
An anode for use in electrolytic processes comprising a valve metal substrate, a coating thereon of conductive tin oxide containing a doping amount of tellurium and an outer coating of at least one of a noble metal or noble metal oxide.
Claim 2
Dependent Claim
41 words
An anode for use in electrolytic processes comprising a valve metal substrate, a coating thereon of conductive tin oxide containing a doping amount of tellurium and an outer coating of at least one of a noble metal or noble metal oxide.
Claim 3
Dependent Claim
31 words
An anode according to claim 1 wherein the tellurium is present in the tin oxide in an amount of up to about 0.3 mole percent, based on the moles of tin.
Claim 4
Dependent Claim
11 words
An anode according to claim 2 wherein the substrate is titanium.
Claim 5
Dependent Claim
15 words
An anode according to claim 3 wherein the outer coating is a noble metal oxide.
Claim 6
Dependent Claim
13 words
An anode according to claim 4 wherein the outer coating is ruthenium oxide.
Claim 7
Dependent Claim
33 words
An anode according to claim 5 wherein the tellurium is present in the tin oxide in an amount of about 0.001 to about 0.2 mole percent of tellurium, based on moles of tin.
Claim 8
Dependent Claim
82 words
In a method of electrolyzing aqueous alkali metal chloride solutions in an electrolytic cell comprising an anode and a cathode wherein chlorine and an alkali metal hydroxide are formed, the improvement which comprises using as the anode, a composite structure comprising a valve metal substrate, a coating thereon of conductive tin oxide containing a doping amount of tellurium and an outer coating on the surface of the conductive tin oxide, of at least one of a noble metal or noble metal oxide.
Claim 9
Dependent Claim
82 words
In a method of electrolyzing aqueous alkali metal chloride solutions in an electrolytic cell comprising an anode and a cathode wherein chlorine and an alkali metal hydroxide are formed, the improvement which comprises using as the anode, a composite structure comprising a valve metal substrate, a coating thereon of conductive tin oxide containing a doping amount of tellurium and an outer coating on the surface of the conductive tin oxide, of at least one of a noble metal or noble metal oxide.
Claim 10
Dependent Claim
49 words
A method according to claim 7 wherein the anode comprises a titanium substrate, a coating thereon of conductive tin oxide containing up to about 0.3 mole percent of tellurium based on moles of tin and an outer coating on the surface of the conductive tin oxide, of ruthenium oxide.
Claim 11
Dependent Claim
17 words
A method according to claim 8 wherein the electrolysis products are mixed to form alkali metal chlorates.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |