US4024044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolysis cathodes bearing a melt-sprayed and leached nickel or cobalt coating
Assignee: ELECTRODE Corp A CORP OF
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Filing: 1975-09-15
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Granted: 1977-05-17
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Expires: 1995-09-15
Abstract
Abstract A cathode adapted for the electrolysis of water or an aqueous solution of an alkali metal halide salt because it gives prolonged lowering of hydrogen overvoltage is provided by an electrically conductive substrate bearing on its surface a coating produced by melt spraying an admixture of particulate nickel or cobalt and particulate aluminum and then leaching out the aluminum.
Inventors
- 👤 James R. Brannan
- 👤 Irving Malkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:02
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12937
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
A cathode for the electrolysis of water or an aqueous alkali metal halide solution which comprises an electrically conductive substrate bearing on at least part of its surface a coating produced by melt spraying an admixture consisting essentially of particulate nickel, cobalt, or mixtures thereof, and particulate aluminum; and leaching out the aluminum from the melt-sprayed coating; said coating, before leaching, being substantially devoid of X-ray-detectable Raney metal alloy formed from melt spraying the particulate nickel or cobalt and particulate aluminum.
Claim 2
Dependent Claim
81 words
A cathode for the electrolysis of water or an aqueous alkali metal halide solution which comprises an electrically conductive substrate bearing on at least part of its surface a coating produced by melt spraying an admixture consisting essentially of particulate nickel, cobalt, or mixtures thereof, and particulate aluminum; and leaching out the aluminum from the melt-sprayed coating; said coating, before leaching, being substantially devoid of X-ray-detectable Raney metal alloy formed from melt spraying the particulate nickel or cobalt and particulate aluminum.
Claim 3
Dependent Claim
31 words
The cathode of claim 1 in which the admixture consists essentially of about 50-95% by weight of particulate nickel, cobalt, or mixtures thereof, and about 50-5% by weight of particulate aluminum.
Claim 4
Dependent Claim
11 words
The cathode of claim 2 in which the substrate is steel.
Claim 5
Dependent Claim
31 words
The cathode of claim 1 in which the admixture consists essentially of about 67-90% by weight of particulate nickel, cobalt, or mixtures thereof, and about 33-10% by weight of particulate aluminum.
Claim 6
Dependent Claim
27 words
The cathode of claim 1 in which the admixture consists essentially of about 67-90% by weight of particulate nickel and about 33-10% by weight of particulate aluminum.
Claim 7
Dependent Claim
11 words
The cathode of claim 5 in which the substrate is steel.
Claim 8
Dependent Claim
27 words
The cathode of claim 1 in which the admixture consists essentially of about 67-90% by weight of particulate cobalt and about 33-10% by weight of particulate aluminum.
Claim 9
Dependent Claim
17 words
In a halo-alkali electrolysis cell having a separator, the improvement which comprises the cathode of claim 2.
Claim 10
Dependent Claim
17 words
In a halo-alkali electrolysis cell having a separator, the improvement which comprises the cathode of claim 5.
Claim 11
Dependent Claim
13 words
In a water electrolyzer, the improvement which comprises the cathode of claim 2.
Claim 12
Independent Claim
65 words
A method for producing a cathode for the electrolysis of water or an aqueous alkali metal halide solution which comprises: A. melt spraying upon the surface of an electrically conductive substrate an admixture consisting essentially of about 50-95% by weight of particulate nickel, cobalt or mixtures thereof and about 50-5% by weight of particulate aluminum; and B. leaching out the aluminum from the melt-sprayed coating.
Claim 13
Independent Claim
65 words
A method for producing a cathode for the electrolysis of water or an aqueous alkali metal halide solution which comprises: A. melt spraying upon the surface of an electrically conductive substrate an admixture consisting essentially of about 50-95% by weight of particulate nickel, cobalt or mixtures thereof and about 50-5% by weight of particulate aluminum; and B. leaching out the aluminum from the melt-sprayed coating.
References Cited (Backward Citations)
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US2568844A
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US3248787A
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US3215563A
Cited
US3403057A
Cited
US3637437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |