US4056664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell having an AgO electrode discharging at an Ag2 O voltage level
Assignee: Duracell Inc USA
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Filing: 1977-01-28
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Granted: 1977-11-01
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Expires: 1997-01-28
Abstract
Abstract The voltage level of an electrochemical cell having a divalent silver oxide (AgO) cathode is reduced to and maintained at the monovalent silver oxide (Ag 2 O) level by an attenuated divalent silver oxide layer between the divalent silver oxide cathode and the cathode current collector.
Inventors
- 👤 Sol Samson Jaffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:37
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
An electrochemical cell comprising an anode, a cathode, a cathode current collector, and an electrolyte wherein said cathode comprises divalent silver oxide, a portion of said divalent silver oxide is attenuated in a direction parallel to the adjacent surfaces of said cathode and said cathode current collector, and the portion of said divalent silver oxide which is attenuated is positioned adjacent the surface of said cathode current collector whereby an increase in internal cell resistance is introduced, and wherein the amount of divalent silver oxide in the attenuated layer is 20 to 50 percent by volume and the balance is a non-conductive, non-reactive material.
Claim 2
Dependent Claim
104 words
An electrochemical cell comprising an anode, a cathode, a cathode current collector, and an electrolyte wherein said cathode comprises divalent silver oxide, a portion of said divalent silver oxide is attenuated in a direction parallel to the adjacent surfaces of said cathode and said cathode current collector, and the portion of said divalent silver oxide which is attenuated is positioned adjacent the surface of said cathode current collector whereby an increase in internal cell resistance is introduced, and wherein the amount of divalent silver oxide in the attenuated layer is 20 to 50 percent by volume and the balance is a non-conductive, non-reactive material.
Claim 3
Dependent Claim
14 words
The cell of claim 1 wherein said non-conductive, non-reactive material comprises a plastic screen.
Claim 4
Dependent Claim
11 words
The cell of claim 2 wherein said plastic screen is cup-shaped.
Claim 5
Dependent Claim
11 words
The cell of claim 2 wherein said plastic screen is disc-shaped.
Claim 6
Dependent Claim
10 words
The cell of claim 2 wherein said plastic is polypropylene.
Claim 7
Dependent Claim
18 words
The cell of claim 2 wherein said screen has an open area of from 25 to 40 percent.
Claim 8
Dependent Claim
16 words
The cell of claim 6 wherein said screen has an open area of about 31 percent.
Claim 9
Dependent Claim
32 words
The cell of claim 1 wherein said portion of divalent silver oxide is admixed with said non-conductive, non-reactive material in powder form whereby said mixture is thereby formed into a discrete body.
Claim 10
Dependent Claim
10 words
The cell of claim 6 wherein said material is polypropylene.
Claim 11
Dependent Claim
24 words
The cell of claim 1 wherein said anode is selected from the group consisting of zinc and amalgamated zinc and said electrolyte is alkaline.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |