US4125449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transition metal oxide electrodes
Assignee: ELECTRODE Corp A CORP OF
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Filing: 1977-05-23
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Granted: 1978-11-14
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Expires: 1997-05-23
Abstract
Abstract Disclosed is an electrode for use in electrochemical processes wherein a metal substrate made of a valve metal such as titanium carries a semi-conducting intermediate coating consisting of a combination of tin and antimony oxides laid down upon the valve metal substrate in a series of layers and a top coating consisting of an oxide selected from the group of chromium, manganese, iron, cobalt, nickel, molybdenum or tungsten applied in a series of layers.
Inventors
- 👤 David L. Lewis
- 👤 Larry A. Schenke
- 👤 Mary R. Suchanski
- 👤 C. Richard Franks, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:10
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
An electrode for use in an electrolytic cell comprising: a valve metal substrate selected from the group of aluminum, molybdenum, niobium, tantalum, titanium, tungsten, zirconium and alloys thereof; on the surface of said valve metal substrate, a semi-conductive intermediate coating of tin and antimony compounds applied and converted to their respective oxides such that said semi-conductive intermediate coating attains a weight greater than 2 grams per square meter of said valve metal substrate surface area; and on the surface of said semi-conductive intermediate coating, a top coating consisting of oxides of transition metals selected from the group consisting of chromium, iron, cobalt, nickel, molybdenum, and tungsten such that said top coating attains a weight greater than 25 grams per square meter of said valve metal substrate surface area.
Claim 2
Dependent Claim
128 words
An electrode for use in an electrolytic cell comprising: a valve metal substrate selected from the group of aluminum, molybdenum, niobium, tantalum, titanium, tungsten, zirconium and alloys thereof; on the surface of said valve metal substrate, a semi-conductive intermediate coating of tin and antimony compounds applied and converted to their respective oxides such that said semi-conductive intermediate coating attains a weight greater than 2 grams per square meter of said valve metal substrate surface area; and on the surface of said semi-conductive intermediate coating, a top coating consisting of oxides of transition metals selected from the group consisting of chromium, iron, cobalt, nickel, molybdenum, and tungsten such that said top coating attains a weight greater than 25 grams per square meter of said valve metal substrate surface area.
Claim 3
Dependent Claim
13 words
An electrode according to claim 1 wherein said valve metal substrate is titanium.
Claim 4
Dependent Claim
14 words
An electrode according to claim 2 wherein said valve metal substrate is porous titanium.
Claim 5
Dependent Claim
26 words
An electrode according to claim 1 wherein said semi-conductive intermediate coating of tin and antimony compounds has between 0.1 and 30 weight percent of antimony compounds.
Claim 6
Dependent Claim
32 words
An electrode according to claim 4 wherein said semi-conductive intermediate coating of tin and antimony compounds has an amount of antimony compounds within the preferred range of 3 to 15 weight percent.
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) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |