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Patent US4188464A successfully refreshed from Google Patents.
US4188464A
Expired / Lapsed
US
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Bipolar electrode with intermediate graphite layer and polymeric layers
Assignee: Occidental Chemical Corp
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Filing: 1978-07-31
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Granted: 1980-02-12
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Expires: 1998-07-31
Abstract
Abstract A composite bipolar electrode structure is described. The structure includes an anode face comprised of a layer of a platinum group metal, metal oxide, or mixtures thereof, deposited on a layer of a valve metal, preferably titanium, a cathode face comprised of a cathode material, suitably a ferrous material, and an intermediate layer of conductive, porous material, such as graphite, positioned to be in electrical contact between the valve metal layer and the cathode material layer. The electrode is assembled by applying a thin layer of a polymeric material on the interfaces of the porous intermediate layers and pressing the components with sufficient pressure to force the polymeric material into the interstices of the intermediate layers.
Inventors
- 👤 Robert G. Adams
- 👤 Dirk Pouli
- 👤 Dana H. Ridgley
- 👤 Donald E. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A composite electrode for use in a bipolar electrolytic cell comprising (a) an anode face, comprised of a layer of a platinum group metal, metal oxide, or mixtures thereof, deposited on (b) one face of a valve metal layer, the opposite face of said valve metal layer joined, and in electrical contact, along substantially its entire surface with (c) one face of graphite layer, the opposite face of said graphite layer joined, and in electrical contact, along substantially its entire surface with (d) one face of a cathode material layer, the opposite face of said cathode material layer, providing a cathode face, said valve metal layer, graphite layer, and cathode material layer being joined by a polymeric material on each face of said graphite layer.
Claim 2
Dependent Claim
125 words
A composite electrode for use in a bipolar electrolytic cell comprising (a) an anode face, comprised of a layer of a platinum group metal, metal oxide, or mixtures thereof, deposited on (b) one face of a valve metal layer, the opposite face of said valve metal layer joined, and in electrical contact, along substantially its entire surface with (c) one face of graphite layer, the opposite face of said graphite layer joined, and in electrical contact, along substantially its entire surface with (d) one face of a cathode material layer, the opposite face of said cathode material layer, providing a cathode face, said valve metal layer, graphite layer, and cathode material layer being joined by a polymeric material on each face of said graphite layer.
Claim 3
Dependent Claim
25 words
The electrode of claim 1 which includes a polymer cap encasing the edges of said electrode and extending into said anode and said cathode face.
Claim 4
Dependent Claim
13 words
The electrode of claim 2 wherein the said cap is a fluorocarbon polymer.
Claim 5
Dependent Claim
13 words
The electrode of claim 3 wherein the fluorocarbon polymer is a perfluoroalkoxy resin.
Claim 6
Dependent Claim
26 words
The electrode of claim 1 wherein the said graphite layer has a vent to allow the escape of hydrogen gas during operational use of the electrode.
Claim 7
Dependent Claim
15 words
The electrode of claim 1 wherein the polymeric material contains a dispersion of conductive material.
Claim 8
Dependent Claim
12 words
The electrode of claim 6 wherein the conductive material is a metal.
Claim 9
Dependent Claim
20 words
The electrode of claim 1 wherein the valve metal is selected from the group of titanium, tantalum, zirconium, and hafnium.
Claim 10
Dependent Claim
11 words
The electrode of claim 1 wherein the valve metal is titanium.
Claim 11
Dependent Claim
13 words
The electrode of claim 1 wherein the cathode material is a ferrous material.
Claim 12
Dependent Claim
11 words
The electrode of claim 10 wherein the ferrous material is steel.
References Cited (Backward Citations)
US3565694A
Cited
US3898102A
Cited
US3884792A
Cited
US4053385A
Cited
US4119519A
Cited
US4118294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |