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US4470893A
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Method for water electrolysis
Assignee: AGC Inc
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Filing: 1982-05-27
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Granted: 1984-09-11
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Expires: 2002-05-27
Abstract
Abstract A method for water electrolysis in an electrolytic cell provided with an anode and a cathode, and cation exchange membrane disposed therebetween. The anode comprises a metal layer formed on an electrode substrate and composed of at least one metal selected from nickel, cobalt and silver, and said metal layer contains partially exposed particles composed essentially of at least one metal selected from nickel, cobalt and silver.
Inventors
- 👤 Yoshio Oda
- 👤 Hiroshi Otouma
- 👤 Eiji Endoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:01
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B1/00; C25B1/01; C25B1/02; C25B1/04; C25B9/00; C25B9/17; C25B9/19; C25B9/23; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A method for electrolyzing water in an electrolytic cell having an anode, a cathode, and a cation exchange membrane disposed therebetween, which comprises electrolyzing water in said electrolytic cell, wherein said anode comprises a metal layer formed on an electrode substrate wherein said metal layer comprises at least one metal selected from the group consisting of nickel, cobalt and silver, and wherein said metal layer contains partially exposed particles consisting essentially of at least one metal selected from nickel, cobalt and silver.
Claim 2
Independent Claim
82 words
A method for electrolyzing water in an electrolytic cell having an anode, a cathode, and a cation exchange membrane disposed therebetween, which comprises electrolyzing water in said electrolytic cell, wherein said anode comprises a metal layer formed on an electrode substrate wherein said metal layer comprises at least one metal selected from the group consisting of nickel, cobalt and silver, and wherein said metal layer contains partially exposed particles consisting essentially of at least one metal selected from nickel, cobalt and silver.
Claim 3
Dependent Claim
54 words
The method for electrolyzing water according to claim 1 wherein said anode further comprises a noble metal selected from the group consisting of platinum, rhodium or an alloy or an oxide thereof in the amount of 1 to 100 miligrams per square centimeter deposited on the surface of said metal layer of the anode.
Claim 4
Dependent Claim
40 words
The method for electrolyzing water according to claim 1, or 2 wherein the cation exchange membrane is provided, on at least one side thereof, with a gas and liquid permeable non-electrode porous layer having a thickness thinner than the membrane.
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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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |