USRE29419E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finely divided RuO2 /plastic matrix
Assignee: Diamond Shamrock Technologies SA
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Filing: 1976-03-16
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Granted: 1977-09-27
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Expires: 1996-03-16
Abstract
Abstract Finely divided RuO 2 serves as an efficient and long-lived electrocatalyst when dispersed in a polymer matrix chemically and mechanically inert to an electrolyte. When applied to a substrate, generally an electrically conductive substrate, an electrode, particularly suited for use as an anode at which oxygen is evolved, is obtained. A coating of polyvinylidene fluoride containing RuO 2 having a particle size of less than 0.1 micron on a titanium substrate is exemplary.
Inventors
- 👤 Denis F. DeCraene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:59
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/095
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
A coating for use in electrolytic applications which coating consists essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron.
Claim 2
Dependent Claim
39 words
A coating for use in electrolytic applications which coating consists essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron.
Claim 3
Dependent Claim
59 words
An electrode for use in electrolytic processes which electrode consists essentially of a supporting substrate having a coating on at least a portion of the surface thereof which coating consists essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron.
Claim 4
Dependent Claim
59 words
An electrode for use in electrolytic processes which electrode consists essentially of a supporting substrate having a coating on at least a portion of the surface thereof which coating consists essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron.
Claim 5
Dependent Claim
14 words
An electrode as in claim 2 wherein the organic polymer is a fluorocarbon polymer.
Claim 6
Dependent Claim
13 words
An electrode as in claim 3 wherein the fluorocarbon polymer is polyvinylidene fluoride.
Claim 7
Dependent Claim
16 words
An electrode as in claim 2 wherein the weight ratio of RuO 2 :polymer is 6-1:1.
Claim 8
Dependent Claim
61 words
An electrode for use in electrolytic processes which electrode consists essentially of an electrically conductive supporting substrate having a coating on at least a portion of the surface thereof which coating consists essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron.
Claim 9
Dependent Claim
61 words
An electrode for use in electrolytic processes which electrode consists essentially of an electrically conductive supporting substrate having a coating on at least a portion of the surface thereof which coating consists essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron.
Claim 10
Dependent Claim
30 words
An electrode as in claim 6 wherein the electrically conductive substrate is selected from the group consisting of nickel, steel, titanium, tantalum, zirconium, niobium, lead, lead-antimony alloys and lead-thallium alloys.
Claim 11
Dependent Claim
80 words
An anode for use in electrolytic processes wherein oxygen is generated as the anode, which anode consists essentially of, a. a supporting substrate selected from the group consisting of nickel, steel, titanium, tantalum, zirconium, niobium, lead, lead-antimony alloys and lead-thallium alloys, and b. a coating consisting essentially of a solidified intimate mixture of a fluorocarbon polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron, the weight ratio of RuO 2 :polymer being from 6-1:1.
Claim 12
Dependent Claim
80 words
An anode for use in electrolytic processes wherein oxygen is generated as the anode, which anode consists essentially of, a. a supporting substrate selected from the group consisting of nickel, steel, titanium, tantalum, zirconium, niobium, lead, lead-antimony alloys and lead-thallium alloys, and b. a coating consisting essentially of a solidified intimate mixture of a fluorocarbon polymer and a RuO 2 electrocatalyst having a particle size of less than 0.1 micron, the weight ratio of RuO 2 :polymer being from 6-1:1.
Claim 13
Dependent Claim
89 words
An anode as in claim 8 wherein the polymer is polyvinylidene fluoride. .Iadd. 10. An electrocatalytic material consisting essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and an electrocatalyst of finely divided RuO 2 having a particle size of less than 0.5 microns. .Iaddend..Iadd. 11. An electrocatalytic material consisting essentially of a solidified intimate mixture of a substantially chemically and mechanically inert organic polymer and an electrocatalyst of RuO 2 having a particle size of approximately 0.1 to approximately 0.5 microns. .Iaddend.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |