EP0205783A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Alkaline cell employing a zinc electrode with reduced mercury additive
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1986-04-05
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Granted: —
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Expires: 2006-04-05
Abstract
Abstract The proportion of mercury needed in alkaline zinc-manganese dioxide cells to provide adequate shelf life or storage stability is reduced by incorporating in such cells indium and a compound having polyethylene oxide linkages.
Inventors
- 👤 Jerrold Winger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 08:09
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/628; H01M4/36; H01M4/38; H01M4/42; H01M6/00; H01M6/04; H01M6/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
In a galvanic cell having a manganese dioxide cathode, an alkaline electrolyte solution and a zinc anode containing mercury, the improvement wherein said mercury is present in an amount between about 0.04 and about 3.0 weight per cent based on the weight of the zinc and wherein a compound having polyethylene oxide linkages in an amount of at least about 0.001 weight percent based on the weight of the zinc and indium in an amount of at least about 0.005 weight percent based on the weight of the zinc are added to the cell.
Claim 2
Dependent Claim
94 words
In a galvanic cell having a manganese dioxide cathode, an alkaline electrolyte solution and a zinc anode containing mercury, the improvement wherein said mercury is present in an amount between about 0.04 and about 3.0 weight per cent based on the weight of the zinc and wherein a compound having polyethylene oxide linkages in an amount of at least about 0.001 weight percent based on the weight of the zinc and indium in an amount of at least about 0.005 weight percent based on the weight of the zinc are added to the cell.
Claim 3
Dependent Claim
40 words
The cell of claim 1 wherein the compound having polyethylene oxide linkages is selected from the group consisting of diethylene glycol, triethylene glycol, polyethylene glycol, methoxy polyethylene glycols, phosphate esters containing at least one polyethylene oxide chain and their derivatives.
Claim 4
Dependent Claim
79 words
-The cell of claim 1 or 2 wherein the mercury is present in an amount between about 0.08 and about 2.0 weight percent based on the weight of the zinc, the compound having polyethylene oxide linkages is present in an amount between about 0.001 and about 0.8 weight percent based on the weight of the zinc and the indium is present in an amount between about 0.005 and about 0.1 weight percent based on the weight of the zinc.
Claim 5
Dependent Claim
70 words
The cell of claim 1 or 2 wherein the mercury is present in an amount below about 1 weight percent based on the weight of the zinc, the compound having polyethylene oxide-linkages is present in an amount below about 0.2 weight percent based on the weight of the zinc and the indium is present in an amount of below about 0.06 weight percent based on the weight of the zinc.
Claim 6
Dependent Claim
31 words
The cell of claim 1 wherein the compound having polyethylene oxide linkages is polyethylene glycol or methoxy polyethylene glycol having an average molecular weight of from about 300 to about 700.
Claim 7
Dependent Claim
77 words
The cell of claim 5 wherein the mercury is present in an amount between about 0.5 and about 1.5 weight percent based on the weight of the zinc, the compound having polyethylene oxide linkages is present in an amount between about 0.01 and about 0.2 weight percent based on the weight of the zinc and the indium is present in an amount between about 0.01 and about 0.06 weight percent based on the weight of the zinc.
Claim 8
Dependent Claim
13 words
The cell of claim 1 wherein the alkaline electrolyte is aqueous potassium hydroxide.
Claim 9
Dependent Claim
40 words
The cell of claim 7 wherein the compound having polyethylene oxide linkages is selected from the group consisting of diethylene glycol, triethylene glycol, polyethylene glycol, methoxy polyethylene glycols, phosphate esters containing at least one polyethylene oxide chain and their derivatives.
Claim 10
Dependent Claim
31 words
The cell of claim 7 wherein the compound having polyethylene oxide linkages is polyethylene glycol or methoxy polyethylene glycol having an average molecular weight of from about 300 to about 700.
Claim 11
Dependent Claim
76 words
The cell of claim 8 wherein the mercury is present in an amount between about 0.04 and about 2.0'weight percent based on the weight of the zinc, the compound having polyethylene oxide linkages is present in an amount between about 0.001 and about 0.8 weight percent based on the weight of the zinc and the indium is present in an amount between about 0.005 and about 0.1 weight percent based on the weight of the zinc.
References Cited (Backward Citations)
No citation records indexed.
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