US3956018A
Expired / Lapsed
US
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Primary electric current-producing dry cell using a (CFx)n cathode and an aqueous alkaline electrolyte
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1974-12-30
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Granted: 1976-05-11
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Expires: 1994-12-30
Abstract
Abstract Primary electric current-producing dry cell comprising a zinc anode, a cathode composed of a polycarbonfluoride compound (CFx)n and an aqueous alkaline electrolyte.
Inventors
- 👤 Akiya Kozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M4/5835; H01M4/06; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
37 words
A primary electric current-producing dry cell comprising a zinc anode, a cathode comprising a polycarbonfluoride compound of the formula (CF x ) n , electrically conductive material and an electrolyte absorbing material, and an aqueous alkaline electrolyte.
Claim 2
Dependent Claim
37 words
A primary electric current-producing dry cell comprising a zinc anode, a cathode comprising a polycarbonfluoride compound of the formula (CF x ) n , electrically conductive material and an electrolyte absorbing material, and an aqueous alkaline electrolyte.
Claim 3
Dependent Claim
47 words
The dry cell as defined by claim 1 wherein the polycarbonfluoride compound has the general formula (CF x ) n wherein x is a value of between about 0.3 and 1.1 and wherein n refers to an indefinite number of the recurring (CF x ) n groups.
Claim 4
Dependent Claim
30 words
The dry cell as defined by claim 2 wherein the electrolyte is an aqueous alkaline solution selected from the group consisting of potassium, sodium and lithium hydroxide and mixture thereof.
Claim 5
Dependent Claim
19 words
The dry cell as defined by claim 2 wherein the polycarbonfluoride compound has an x value of about 1.0.
Claim 6
Dependent Claim
27 words
The dry cell as defined by claim 4 wherein the electrolyte is an aqueous potassium hydroxide electrolyte solution in the concentration range of 5 to 13 molar.
Claim 7
Dependent Claim
90 words
The dry cell as defined by claim 4 wherein the cathode comprises a mixture of from about 60 to 95 weight percent of (CF 1 .0) n powder, from about 5 to 40 weight percent particulate electrically conductive material based on the weight of the mixture of active and conductive material, from about 0.5 to 20 weight percent of a polymeric binder including said electrolyte absorbing material and from about 2 to 10 weight percent of a collodial electrically conductive material based on the total weight of the cathode mixture.
Claim 8
Dependent Claim
79 words
The dry cell as defined by claim 5 wherein the cathode is composed of a mixture of from about 60 to 95 weight percent (CF 1 .0) n powder, from about 5 to 40 weight percent of an electrically conductive material biased on the weight of the active and conductive material, and from about 1 to 10 weight percent of a binder including said electrolyte-absorbing material, the latter percentages being based on the total weight of the cathode mixture.
Claim 9
Dependent Claim
47 words
The dry cell as defined by claim 5 wherein a compound selected from the group consisting of Al 2 O 3 , SiO 2 , TiO 2 , ZnO and mixture thereof, is added to said electrolyte in an amount sufficient to increase the cell discharge voltage.
Claim 10
Dependent Claim
36 words
The dry cell as defined by claim 7 wherein a surfactant is added to said cathode mixture in amounts sufficient to insure the wetting of the (CF 1 .0) n powder by said aqueous alkaline electrolyte.
Claim 11
Dependent Claim
22 words
The dry cell as defined by claim 7 wherein said electrolyte-absorbing material is selected from the group consisting of carboxymethylcellulose and carboxymethylhydroxyethyl-cellulose.
Claim 12
Dependent Claim
24 words
The dry cell as defined by claim 7 wherein the electrically conductive material is selected from the group consisting of carbon black and graphite.
Claim 13
Dependent Claim
28 words
The dry cell as defined by claim 7 wherein the (CF 1 .0) n powder possess a surface area of at least about 200 square meters per gram.
Claim 14
Dependent Claim
27 words
The dry cell as defined by claim 7 wherein the electrolyte is an aqueous potassium hydroxide electrolyte solution in the concentration range of 13 to 14 molar.
Claim 15
Dependent Claim
30 words
The dry cell as defined by claim 9 wherein the surfactant is added to the cathode mixture in amounts ranging from about 0.01 to 0.1 weight percent of said mixture.
Claim 16
Dependent Claim
35 words
A primary electric current-producing dry cell comprising a zinc anode, a cathode comprising a polycarbonfluoride compound of the formula (CF x ) n and electrically conductive material, an aqueous alkaline electrolyte and a wetting agent.
Claim 17
Dependent Claim
35 words
A primary electric current-producing dry cell comprising a zinc anode, a cathode comprising a polycarbonfluoride compound of the formula (CF x ) n and electrically conductive material, an aqueous alkaline electrolyte and a wetting agent.
Claim 18
Dependent Claim
47 words
A dry cell as defined by claim 15 wherein the polycarbonfluoride compound has the general formula (CF x ) n wherein x is a value of between about 0.3 and 1.1 and wherein n refers to an indefinite number of the recurring (CF x ) n groups.
Claim 19
Dependent Claim
30 words
The dry cell as defined by claim 16 wherein the electrolyte is an aqueous alkaline solution selected from the group consisting of potassium, sodium and lithium hydroxide and mixtures thereof.
Claim 20
Dependent Claim
19 words
The dry cell as defined by claim 17 wherein the polycarbonfluoride compound has an x value of about 1.0.
Claim 21
Dependent Claim
27 words
The dry cell as defined by claim 18 wherein the electrolyte is an aqueous potassium hydroxide electrolyte solution in the concentration range of 5 to 13 molar.
Claim 22
Dependent Claim
87 words
The dry cell as defined by claim 18 wherein the cathode comprises a mixture of from about 60 to 95 weight percent of (CF 1 .0) n powder, from about 5 to 40 weight percent particulate electrically conductive material based on the weight of the mixture of active and conductive material, from about 0.5 to 20 weight percent of a electrolyte wettable polymeric binder and from about 2 to 10 weight percent of a colloidal electrically conductive material based on the total weight of the cathode mixture.
Claim 23
Dependent Claim
73 words
The dry cell as defined by claim 19 wherein the cathode is comprises a mixture of from about 60 to 95 weight percent (CF 1 .0) n powder, from about 5 to 40 weight percent of an electrically conductive material based on the weight of the active and conductive material, from about 1 to 10 weight percent of a binder, the latter percentages being based on the total weight of the cathode mixture.
Claim 24
Dependent Claim
47 words
The dry cell as defined by claim 19 wherein a compound selected from the group consisting of Al 2 O 3 , SiO 2 , TiO 2 , ZnO and mixtures thereof, is added to said electrolyte in an amount sufficient to increase the cell discharge voltage.
Claim 25
Dependent Claim
37 words
The dry cell as defined by claim 21 wherein said wetting agent is added to said cathode mixture in amounts sufficient to insure the wetting of the (CF 1 .0) n powder by said aqueous alkaline electrolyte.
Claim 26
Dependent Claim
37 words
The dry cell as defined by claim 21 wherein said wetting agent is added to said aqueous alkaline electrolyte in amounts sufficient to insure the wetting of (CF 1 .0) n powder by said aqueous alkaline electrolyte.
Claim 27
Dependent Claim
24 words
The dry cell as defined by claim 21 wherein the electrically conductive material is selected from the group consisting of carbon black and graphite.
Claim 28
Dependent Claim
27 words
The dry cell as defined by claim 21 wherein the (CF 1 .0) n powder possesses a surface area of at least about 200 meters per gram.
Claim 29
Dependent Claim
27 words
The dry cell as defined by claim 21 wherein the electrolyte is an aqueous potassium hydroxide electrolyte solution in the concentration range of 13 to 14 molar.
Claim 30
Dependent Claim
31 words
The dry cell as defined by claim 23 wherein said wetting agent is added to the cathode mixture in amounts ranging from about 0.01 to 0.1 weight percent of said mixture.
Claim 31
Dependent Claim
18 words
The dry cell as defined by claim 23 wherein said wetting agent is an electrolyte wettable polymeric material.
Claim 32
Dependent Claim
22 words
The dry cell as defined by claim 28 wherein said wetting agent is a synthetic nonionic organic surfactant based on alkylaryl polyethers.
Claim 33
Dependent Claim
22 words
The dry cell as defined by claim 24 whererin said wetting agent is a synthetic nonionic organic surfactant based on alkylaryl polyethers.
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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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |