US4326943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode in water electrolysis
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1980-06-25
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Granted: 1982-04-27
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Expires: 2000-06-25
Abstract
Abstract An improved electrode for the electrolysis of water comprising a porous sinter plate of titanium or a titanium alloy having on one surface a coating of a finely divided catalyst comprising a mixture of ruthenium oxide and iridium oxide. In a preferred embodiment, the electrode has on its outer margin a dense, non-porous zone having a smooth appearance.
Inventors
- 👤 Robert Banziger
- 👤 Roland Isenschmid
- 👤 Anton Menth
- 👤 Rene Muller
- 👤 Samuel Stucki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:44
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
An electrode for the electrolysis of water comprising a porous sinter plate of titanium or a titanium alloy having on one surface a coating of a finely particulate catalyst consisting essentially of a mixture of ruthenium oxide and iridium oxide; wherein said electrode has at its outer margin a dense, non-porous zone having a smooth appearance wherein the pores in said zone are filled by impregnation with a suitable impregnating substance.
Claim 2
Dependent Claim
71 words
An electrode for the electrolysis of water comprising a porous sinter plate of titanium or a titanium alloy having on one surface a coating of a finely particulate catalyst consisting essentially of a mixture of ruthenium oxide and iridium oxide; wherein said electrode has at its outer margin a dense, non-porous zone having a smooth appearance wherein the pores in said zone are filled by impregnation with a suitable impregnating substance.
Claim 3
Dependent Claim
33 words
An electrode in accordance with claim 1 wherein said porous sinter plate is prepared from titanium or a titanium alloy having a particular size of from about 50 microns to about 150 microns.
Claim 4
Dependent Claim
23 words
An electrode in accordance with any of claims 1 or 2 wherein said porous sinter plate is comprised of an alloy of titanium.
Claim 5
Dependent Claim
24 words
An electrode in accordance with claim 3 wherein said alloy is 90 molar % titanium, 6 molar % aluminium and 4 molar % vanadium.
Claim 6
Dependent Claim
17 words
An electrode in acccordance with claim 1 wherein said impregnating substance is titanium or a titanium alloy.
Claim 7
Dependent Claim
16 words
An electrode in accordance with claim 1 wherein said impregnating substance is a suitable plastic material.
Claim 8
Dependent Claim
15 words
An electrode in accordance with claim 6 wherein said plastic material is a fluorocarbon polymer.
Claim 9
Dependent Claim
13 words
An electrode in accordance with claim 7 wherein said fluorocarbon polymer is polytetrafluoroethylene.
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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |