Patent US4461677A successfully refreshed from Google Patents.
US4461677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for charging silver electrodes to monoxide level
Assignee: United States Department of the Navy
•
Filing: 1983-07-05
•
Granted: 1984-07-24
•
Expires: 2003-07-05
Abstract
Abstract A method of charging silver electrodes in which an electrode of porous sintered silver is anodized in the conventional manner in alkaline electrolyte to the so-called peroxide level and usually beyond, into the oxygen-evolution level, where the majority of the silver has been electroformed into divalent silver oxide. The charged electrode is then permitted to wet stand in the electrolyte or other alkaline solution to allow the residual unanodized silver in the electrode to convert a portion of the divalent silver oxide to monovalent silver oxide by a reverse disproportionation reaction.
Inventors
- 👤 Theodore Katan
- 👤 Pamela J. Carlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/34; H01M4/06; H01M4/08; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
A method for making silver-oxide electrodes which comprises: (a) anodizing an electrode structure of porous silver in an aqueous electrolytic solution until said electrode is charged to the peroxide level; (b) removing the anodizing current; and (c) allowing said charged electrode to wet stand in said electrolytic solution to allow residual unanodized silver to convert a portion of the divalent silver oxide formed by said step of anodizing to monovalent silver oxide by reverse a disproportionation reaction.
Claim 2
Independent Claim
77 words
A method for making silver-oxide electrodes which comprises: (a) anodizing an electrode structure of porous silver in an aqueous electrolytic solution until said electrode is charged to the peroxide level; (b) removing the anodizing current; and (c) allowing said charged electrode to wet stand in said electrolytic solution to allow residual unanodized silver to convert a portion of the divalent silver oxide formed by said step of anodizing to monovalent silver oxide by reverse a disproportionation reaction.
Claim 3
Independent Claim
88 words
A method for making silver-oxide electrodes which comprises: (a) applying an anodizing current between an electrode structure of porous silver and a counter electrode in an electrolytic solution, (b) disconnecting said anodizing current when said electrode structure is charged to the peroxide level; and (c) allowing said charged electrode to wet stand in said electrolytic solution to allow residual unanodized silver to convert a portion of the divalent silver oxide, formed by said step of applying an anodizing current, to monovalent silver oxide by a reverse disproportionation reaction.
Claim 4
Independent Claim
88 words
A method for making silver-oxide electrodes which comprises: (a) applying an anodizing current between an electrode structure of porous silver and a counter electrode in an electrolytic solution, (b) disconnecting said anodizing current when said electrode structure is charged to the peroxide level; and (c) allowing said charged electrode to wet stand in said electrolytic solution to allow residual unanodized silver to convert a portion of the divalent silver oxide, formed by said step of applying an anodizing current, to monovalent silver oxide by a reverse disproportionation reaction.
Claim 5
Dependent Claim
36 words
A method as recited in claim 1 wherein said step of anodizing further includes anodizing said electrode structure of porous silver in an aqueous electrolytic solution until said electrode is charged to the oxygen evolution level.
Claim 6
Dependent Claim
30 words
A method as recited in claim 2 wherein said step of disconnecting said anodizing current comprises disconnecting said anodizing current when said electrode structure is charged to the oxygen-evolution level.
Claim 7
Dependent Claim
17 words
A method as recited in claim 1 wherein the electrolyte solution is a solution of potassium hydroxide.
References Cited (Backward Citations)
US3017448A
Cited
US3212934A
Cited
US3353998A
Cited
US4038467A
Cited
US4096328A
Cited
US4121021A
Cited
US4101719A
Cited
US4056664A
Cited
US4078127A
Cited
US4250234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |