US3773554A
Expired / Lapsed
US
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Electrodes for electrochemical processes
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-03-01
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Granted: 1973-11-20
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Expires: 1991-03-01
Abstract
Abstract An electrode for use in electrochemical processes is manufactured by applying to a film-forming metal support member (preferably a titanium member) first a layer of an operative electrode material (preferably a layer of ruthenium dioxide) and then a layer of a film-forming metal oxide (preferably a layer of titanium dioxide by thermal decomposition of a coating comprising an organo-titanium compound) and optionally repeating this twolayer-application sequence at least once.
Inventors
- 👤 A Scrutton
- 👤 D Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:24
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
A method according to claim 1, wherein the total weight of operative electrode material and film-forming metal oxide deposited on the film-forming metal support member is in the range 10-15g/m2 of the coated surface.
Claim 2
Dependent Claim
32 words
A method according to claim 1, wherein each of the steps (1) consists of a coating operation carried out a plurality of times to build up a thickness of operative electrode material.
Claim 3
Dependent Claim
32 words
A method according to claim 1, wherein each of the steps (2) consists of a plurality of said coating and heating operations whereby a thickness of film-forming metal oxide is built up.
Claim 4
Dependent Claim
60 words
A method according to claim 1, wherein in each of the steps (1) the operative electrode material is ruthenium dioxide, in each of the steps (2) the thermally-decomposable organo-compound of a film-forming metal is a resinate and the support member is made of titanium or an alloy based on titanium and having anodic polarisation properties similar to those of titanium.
Claim 5
Dependent Claim
77 words
A method according to claim 1, wherein in each of the steps (1) the operative electrode material is ruthenium dioxide, in each of the steps (2) the thermally-decomposable organo-compound of a film-forming metal is an alkyl titanate, an alkyl polytitanate or an alkyl halotitanate in which the halogen is chlorine, bromine or fluorine and the support member is made of titanium or an alloy based on titanium and having anodic polarisation properties similar to those of titanium.
Claim 6
Dependent Claim
33 words
A method according to claim 6 wherein step (2) comprises drying the coating by heating at 100*-200*C and then heating at 250*-800*C to convert the organo-compound to an oxide of the film-forming metal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |