US3992271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for gas generation
Assignee: RTX Corp
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Filing: 1975-03-03
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Granted: 1976-11-16
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Expires: 1995-03-03
Abstract
Abstract A gas generation apparatus which is useful for the concentration of oxygen or for the generation of oxygen and hydrogen by electrolysis has a catalytic cathode, an improved catalytic anode with a catalyst selected from platinum-iridium alloys containing 5 to 50 per cent iridium, a cation-exchange membrane positioned between and in electrical contact with the cathode and anode, means for providing a direct current potential between the cathode and the anode, and outlet means for removing gas from at least one of the electrodes. Methods are described for the concentration of oxygen and for generation of oxygen and hydrogen by electrolysis.
Inventors
- 👤 Ivan F. Danzig
- 👤 Anthony B. La Conti
- 👤 Joseph M. Amore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/92; H01M4/928; C; C25; C25B; C25B1/00; C25B1/01; C25B1/02; C25B1/04; C25B9/00; C25B9/17; C25B9/19; C25B9/23; H01M2004/8678; H01M2004/8684; H01M2300/00; H01M2300/0017; H01M2300/0065; H01M2300/0082; H01M4/921; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36; Y02E60/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
In an electrolytic method for generating hydrogen and oxygen comprising providing a catalytic cathode, providing a catalytic anode, positioning a cation exchange membrane positioned between and in electrical contact with the cathode and the anode, providing a direct current potential between the cathode and the anode, and generating simultaneously separate supplies of hydrogen and oxygen, the improvement in combination therewith of providing the anode with an oxygen evolution catalyst consisting of reduced platinum-iridium alloys comprising reduced 5 to 50 weight percent iridium.
Claim 2
Dependent Claim
82 words
In an electrolytic method for generating hydrogen and oxygen comprising providing a catalytic cathode, providing a catalytic anode, positioning a cation exchange membrane positioned between and in electrical contact with the cathode and the anode, providing a direct current potential between the cathode and the anode, and generating simultaneously separate supplies of hydrogen and oxygen, the improvement in combination therewith of providing the anode with an oxygen evolution catalyst consisting of reduced platinum-iridium alloys comprising reduced 5 to 50 weight percent iridium.
Claim 3
Dependent Claim
22 words
In an electrolytic method as in claim 1, in which the catalyst is 5 weight percent iridium and the balance is platinum.
Claim 4
Dependent Claim
82 words
In a method for concentrating oxygen comprising providing a catalytic cathode, providing a catalytic anode, positioning a cation exchange membrane between and in electrical contact with the cathode and the anode, supplying an oxygen oxidant to the cathode, providing a direct current potential between the cathode and the anode, and concentrating oxygen at the anode, the improvement in combination therewith of providing the anode with a catalyst consisting of reduced platinum and iridium alloy comprising reduced 5 to 50 weight percent iridium.
Claim 5
Dependent Claim
82 words
In a method for concentrating oxygen comprising providing a catalytic cathode, providing a catalytic anode, positioning a cation exchange membrane between and in electrical contact with the cathode and the anode, supplying an oxygen oxidant to the cathode, providing a direct current potential between the cathode and the anode, and concentrating oxygen at the anode, the improvement in combination therewith of providing the anode with a catalyst consisting of reduced platinum and iridium alloy comprising reduced 5 to 50 weight percent iridium.
Claim 6
Dependent Claim
24 words
In a method for generating oxygen as in claim 3, in which the catalyst is 5 weight percent iridium and the balance is platinum.
References Cited (Backward Citations)
US3489670A
Cited
US3489670B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |