US4272354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodes for electrolytic processes
Assignee: ELECTRODE Corp A DE CORP
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Filing: 1979-11-26
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Granted: 1981-06-09
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Expires: 1999-11-26
Abstract
Abstract Electrodes for electrolytic processes comprise an electrically-conductive and corrosion-resistant substrate, having a coating thereon which contains a solid solution of tin dioxide and bismuth trioxide, preferably in a ratio of 9:1 to 4:1 by weight of the respective metals. This solid solution may form the active coating or an intermediate layer covered with other electrocatalytic materials or may be included in a multi-component coating having selective properties for halogen evolution and oxygen inhibition.
Inventors
- 👤 Vittorio De Nora
- 👤 Antonio Nidola
- 👤 Placido M. Spaziante
- 👤 Giuseppe Bianchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:26
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
An ion selective anode comprising an electrically conductive substrate having a surface coating selected from (a) one or more platinum group metals, (b) one or more platinum group metal oxides, (c) mixtures of one or more platinum group metal oxides with one or more valve metal oxides, and (d) oxides of metals from the group consisting of chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel lead, germanium, antimony, arsenic, zinc, cadmium, selenium and tellarium, said surface coating and conductive substrate being joined by an intermediate coating consisting of one or more layers of a solid solution of a mixture of tin dioxide and bismuth trioxide having a tin to bismuth metal weight ratio ranging from 1:10 to 100:1.
Claim 2
Dependent Claim
117 words
An ion selective anode comprising an electrically conductive substrate having a surface coating selected from (a) one or more platinum group metals, (b) one or more platinum group metal oxides, (c) mixtures of one or more platinum group metal oxides with one or more valve metal oxides, and (d) oxides of metals from the group consisting of chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel lead, germanium, antimony, arsenic, zinc, cadmium, selenium and tellarium, said surface coating and conductive substrate being joined by an intermediate coating consisting of one or more layers of a solid solution of a mixture of tin dioxide and bismuth trioxide having a tin to bismuth metal weight ratio ranging from 1:10 to 100:1.
Claim 3
Dependent Claim
18 words
An ion selective anode as stated in claim 1 wherein said electrically conductive substrate is a valve metal.
Claim 4
Dependent Claim
22 words
An ion selective anode as stated in claim 2 wherein the tin to bismuth metal weight ratio ranges from 9:1 to 4:1.
Claim 5
Dependent Claim
110 words
An ion selective anode comprising an electrically conductive substrate having a surface coating selected from (a) one or more platinum group metals, (b) one or more platinum group metal oxides, (c) mixtures of one or more platinum group metal oxides with one or more valve oxides, and (d) oxides of metals from the group consisting of chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, lead, germanium, antimony, arsenic, zinc, cadmium, selenium and tellarium, said surface coating also containing from one to 20 percent by weight of a solid solution of a mixture of tin dioxide and bismuth trioxide having a tin to bismuth metal weight ratio ranging from 1:10 to 100:1.
Claim 6
Dependent Claim
110 words
An ion selective anode comprising an electrically conductive substrate having a surface coating selected from (a) one or more platinum group metals, (b) one or more platinum group metal oxides, (c) mixtures of one or more platinum group metal oxides with one or more valve oxides, and (d) oxides of metals from the group consisting of chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, lead, germanium, antimony, arsenic, zinc, cadmium, selenium and tellarium, said surface coating also containing from one to 20 percent by weight of a solid solution of a mixture of tin dioxide and bismuth trioxide having a tin to bismuth metal weight ratio ranging from 1:10 to 100:1.
Claim 7
Dependent Claim
18 words
An ion selective anode as stated in claim 4 wherein said electrically conductive substrate is a valve metal.
Claim 8
Dependent Claim
22 words
An ion selective anode as stated in claim 5 wherein the tin to bismuth metal weight ratio ranges from 9:1 to 4:1.
Claim 9
Dependent Claim
59 words
An ion selective anode comprising an electrically conductive valve metal substrate having a surface coating thereon containing, in parts by weight of the respective metal or metals: (a) 30-50 parts of ruthenium dioxide, (b) 30-60 parts of titanium dioxide, (c) 5-15 parts of a solid solution of tin dioxide and bismuth dioxide, and (d) 1-6 parts of cobalt oxide.
Claim 10
Dependent Claim
59 words
An ion selective anode comprising an electrically conductive valve metal substrate having a surface coating thereon containing, in parts by weight of the respective metal or metals: (a) 30-50 parts of ruthenium dioxide, (b) 30-60 parts of titanium dioxide, (c) 5-15 parts of a solid solution of tin dioxide and bismuth dioxide, and (d) 1-6 parts of cobalt oxide.
References Cited (Backward Citations)
US3718550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |