US3874932A
Expired / Lapsed
US
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Dry cells
Assignee: Maxell Ltd
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Filing: 1973-06-15
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Granted: 1975-04-01
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Expires: 1993-06-15
Abstract
Abstract A dry cell comprising a zinc anode, a depolarizing mix and a separator which functions to separate the anode from the depolarizing mix, said depolarizing mix containing manganese dioxide as its main component and acetylene black immersed in an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the chlorine being present in the form of said zinc chloride or zinc chloride with added hydrochloric acid; said depolarizing mix also containing said electrolyte in an amount in millimeters determined by multiplying the BET total surface area of manganese dioxide and acetylene black in m2/gram by a value of about 0.008 to 0.015, and said depolarizing mix further containing the electrolyte in an amount of about 2 to 4 ml. per gram of acetylene black.
Inventors
- 👤 Yoshio Uftani
- 👤 Rokurou Ikebata
- 👤 Takayuki Togo
- 👤 Tugiyasu Iwamaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:52
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
100 words
A DRY CELL COMPRISING A ZINC ANODE, A DEPOLARIZING MIX AND A SEPARATOR WHICH FUNCTIONS TO SEPARATE THE ANODE FROM THE DEPOLARIZING MIX, SAID DEPOLARIZING MIX CONTAINING MANGANESE DIOXIDE AS ITS MAIN COMPONENT AND ACETYLENE BLACK IMMERSED IN AN ELECTROLYTE HAVING ZINC CHLORIDE AS ITS MAIN INGREDIENT, SAID DEPOLARIZING MIX CONTAINING WATER AND CHLORINE IN AN AMOUNT OF ABOUT 50 TO 90 PARTS BY WEIGHT AND ABOUT 5.5 TO 14.5 PARTS BY WEIGHT, RESPECTIVELY, PER 100 PARTS BY WEIGHT OF MANGANESE DIOXIDE, THE CHLORINE BEING PRESENT IN THE FORM OF SAID ZINC CHLORIDE OR ZINC CHLORIDE WITH ADDED HYDROCHLORIC ACID.
Claim 2
Dependent Claim
100 words
A DRY CELL COMPRISING A ZINC ANODE, A DEPOLARIZING MIX AND A SEPARATOR WHICH FUNCTIONS TO SEPARATE THE ANODE FROM THE DEPOLARIZING MIX, SAID DEPOLARIZING MIX CONTAINING MANGANESE DIOXIDE AS ITS MAIN COMPONENT AND ACETYLENE BLACK IMMERSED IN AN ELECTROLYTE HAVING ZINC CHLORIDE AS ITS MAIN INGREDIENT, SAID DEPOLARIZING MIX CONTAINING WATER AND CHLORINE IN AN AMOUNT OF ABOUT 50 TO 90 PARTS BY WEIGHT AND ABOUT 5.5 TO 14.5 PARTS BY WEIGHT, RESPECTIVELY, PER 100 PARTS BY WEIGHT OF MANGANESE DIOXIDE, THE CHLORINE BEING PRESENT IN THE FORM OF SAID ZINC CHLORIDE OR ZINC CHLORIDE WITH ADDED HYDROCHLORIC ACID.
Claim 3
Dependent Claim
103 words
A dry cell having a zinc anode, an electrolyte containing zinc chloride as its main ingredient, and a depolarizing mix containing a mixture of manganese dioxide, acetylene black, and said electrolyte, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the electrolyte being present in said depolarizing mix in an amount in milliliters determined by multiplying the BET total surface area of manganese dioxide and acetylene black in m2/gram by a value of about 0.008 to 0.015.
Claim 4
Dependent Claim
103 words
A dry cell having a zinc anode, an electrolyte containing zinc chloride as its main ingredient, and a depolarizing mix containing a mixture of manganese dioxide, acetylene black, and said electrolyte, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the electrolyte being present in said depolarizing mix in an amount in milliliters determined by multiplying the BET total surface area of manganese dioxide and acetylene black in m2/gram by a value of about 0.008 to 0.015.
Claim 5
Dependent Claim
86 words
A dry cell having a zinc anode, an electrolyte containing zinc chloride as its main component, and a depolarizing mix containing a mixture of manganese dioxide, acetylene black, and said electrolyte, said depolarizing mix containing the electrolyte in an amount of about 2 to 4 ml. per gram of acetylene black, the content of water and chlorine in said depolarizing mix being about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight oF manganese dioxide.
Claim 6
Dependent Claim
86 words
A dry cell having a zinc anode, an electrolyte containing zinc chloride as its main component, and a depolarizing mix containing a mixture of manganese dioxide, acetylene black, and said electrolyte, said depolarizing mix containing the electrolyte in an amount of about 2 to 4 ml. per gram of acetylene black, the content of water and chlorine in said depolarizing mix being about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight oF manganese dioxide.
Claim 7
Dependent Claim
23 words
The dry cell of claim 1, wherein the concentration of zinc chloride in the electrolyte is about 13 to 27 parts by weight.
Claim 8
Dependent Claim
23 words
The dry cell of claim 2, wherein the concentration of zinc chloride in the electrolyte is about 13 to 27 parts by weight.
Claim 9
Dependent Claim
23 words
The dry cell of claim 3, wherein the concentration of zinc chloride in the electrolyte is about 13 to 27 parts by weight.
Claim 10
Dependent Claim
24 words
The dry cell of claim 1, wherein ammonium chloride is present in the electrolyte in an amount less than about 10 parts by weight.
Claim 11
Dependent Claim
24 words
The dry cell of claim 2, wherein ammonium chloride is present in the electrolyte in an amount less than about 10 parts by weight.
Claim 12
Dependent Claim
24 words
The dry cell of claim 3, wherein ammonium chloride is present in the electrolyte in an amount less than about 10 parts by weight.
Claim 13
Dependent Claim
24 words
The dry cell of claim 1, wherein the separator is coated with a paste material in an amount of about 8 to 70 g./m2.
Claim 14
Dependent Claim
15 words
The dry cell of claim 10, wherein the paste material is starch or methyl cellulose.
Claim 15
Dependent Claim
21 words
The dry cell of claim 1, wherein the weight ratio of manganese dioxide to acetylene black is about 4/1 to 7/1.
Claim 16
Dependent Claim
21 words
The dry cell of claim 2, wherein the weight ratio of manganese dioxide to acetylene black is about 4/1 to 7/1.
Claim 17
Dependent Claim
21 words
The dry cell of claim 3, wherein the weight ratio of manganese dioxide to acetylene black is about 4/1 to 7/1.
Claim 18
Dependent Claim
83 words
A depolarizing mix for use in a dry cell comprising manganese dioxide as its main component and acetylene black immersed in an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts be weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the chlorine being present in the form of said zinc chloride or zinc chloride with added hydrochloric acid.
Claim 19
Dependent Claim
83 words
A depolarizing mix for use in a dry cell comprising manganese dioxide as its main component and acetylene black immersed in an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts be weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the chlorine being present in the form of said zinc chloride or zinc chloride with added hydrochloric acid.
Claim 20
Dependent Claim
99 words
A depolarizing mix for use in a dry cell comprising a mixture of manganese dioxide, acetylene black, and an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the electrolyte being present in said depolarizing mix in an amount in milliliters determined by multiplying the BET total surface area of manganese dioxide and acetylene black in m2/gram by a value of about 0.008 to 0.015.
Claim 21
Dependent Claim
99 words
A depolarizing mix for use in a dry cell comprising a mixture of manganese dioxide, acetylene black, and an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the electrolyte being present in said depolarizing mix in an amount in milliliters determined by multiplying the BET total surface area of manganese dioxide and acetylene black in m2/gram by a value of about 0.008 to 0.015.
Claim 22
Dependent Claim
82 words
A depolarizing mix for use in a dry cell comprising a mixture of manganese dioxide, acetylene black, and an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing the electrolyte in an amount of about 2 to 4 ml. per gram of acetylene black, the content of water and chlorine in said depolarizing mix being about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide.
Claim 23
Dependent Claim
82 words
A depolarizing mix for use in a dry cell comprising a mixture of manganese dioxide, acetylene black, and an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing the electrolyte in an amount of about 2 to 4 ml. per gram of acetylene black, the content of water and chlorine in said depolarizing mix being about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |