USRE30458E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cells
Assignee: Maxell Ltd
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Filing: 1977-12-30
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Granted: 1980-12-23
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Expires: 1997-12-30
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 m 2 /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 Uetani
- 👤 Rokurou Ikebata
- 👤 Takayuki Togo
- 👤 Tugiyasu Iwamaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:15
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
214 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 .Iadd.containing about 2 to 3.4 percent by weight of ammonium chloride and .Iaddend.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. .[.2. 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 m 2 /gram by a value of
Claim 2
Dependent Claim
214 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 .Iadd.containing about 2 to 3.4 percent by weight of ammonium chloride and .Iaddend.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. .[.2. 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 m 2 /gram by a value of
Claim 3
Dependent Claim
112 words
about 0.008 to 0.015..]. 3. A dry cell having a zinc anode, an electrolyte containing .Iadd.about 2 to 3.4 percent by weight of ammonium chloride and having .Iaddend.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.Iadd., the chlorine being present in the form of said
Claim 4
Dependent Claim
112 words
about 0.008 to 0.015..]. 3. A dry cell having a zinc anode, an electrolyte containing .Iadd.about 2 to 3.4 percent by weight of ammonium chloride and having .Iaddend.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.Iadd., the chlorine being present in the form of said
Claim 5
Dependent Claim
47 words
zinc chloride or zinc chloride with added hydrochloric acid. .Iaddend. 4. The dry cell of claim 1, wherein the concentration of zinc chloride in the electrolyte is about 13 to 27 .[.parts.]. .Iadd.percent .Iaddend.by weight. .[.5. The dry cell of claim 2, wherein the concentration of zinc
Claim 6
Dependent Claim
111 words
chloride in the electrolyte is about 13 to 27 parts by weight..]. 6. The dry cell of claim 3, wherein the concentration of zinc chloride in the electrolyte is about 13 to 27 .[.parts.]. .Iadd.percent .Iaddend.by weight. .[.7. The dry cell of claim 1, wherein ammonium chloride is present in the electrolyte in an amount less than about 10 parts by weight..]. .[.8. The dry cell of claim 2, wherein ammonium chloride is present in the electrolyte in an amount less than about 10 parts by weight..]. .[.9. The dry cell of claim 3, wherein ammonium chloride is present in the electrolyte in an amount less than about 10 parts by
Claim 7
Dependent Claim
13 words
weight..]. 10. The dry cell of claim 1, wherein the separator is coated
Claim 8
Dependent Claim
30 words
with a paste material in an amount of about 8 to 70 g./m 2 . 11. The dry cell of claim 10, wherein the paste material is starch or methyl
Claim 9
Dependent Claim
38 words
cellulose. 12. The dry cell of claim 1, wherein the weight ratio of manganese dioxide to acetylene black is about 4/1 to 7/1. .[.13. The dry cell of claim 2, wherein the weight ratio of manganese dioxide to
Claim 10
Dependent Claim
26 words
acetylene black is about 4/1 to 7/1..]. 14. The dry cell of claim 3, wherein the weight ratio of manganese dioxide to acetylene black is about
Claim 11
Dependent Claim
96 words
4/1 to 7/1. 15. A depolarizing mix for use in a dry cell comprising manganese dioxide as its main component and acetylene black immersed in an electrolyte .Iadd.containing about 2 to 3.4 percent by weight of ammonium chloride and .Iaddend.having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts .[.be.]. .Iadd.by .Iaddend.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
Claim 12
Dependent Claim
96 words
4/1 to 7/1. 15. A depolarizing mix for use in a dry cell comprising manganese dioxide as its main component and acetylene black immersed in an electrolyte .Iadd.containing about 2 to 3.4 percent by weight of ammonium chloride and .Iaddend.having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts .[.be.]. .Iadd.by .Iaddend.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
Claim 13
Dependent Claim
97 words
with added hydrochloric acid. .[.16. 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 m 2
Claim 14
Dependent Claim
97 words
with added hydrochloric acid. .[.16. 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 m 2
Claim 15
Dependent Claim
220 words
/gram by a value of about 0.008 to 0.015..]. 17. A depolarizing mix for use in a dry cell comprising a mixture of manganese dioxide, acetylene black, and an electrolyte .Iadd.containing about 2 to 3.4 percent by weight of ammonium chloride and .Iaddend.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.Iadd., the chlorine being present in the form of said zinc chloride or zinc chloride with added hydrochloric acid. .Iaddend. .Iadd. 18. The depolarizing mix of claim 15, wherein the concentration of zinc chloride in the electrolyte is about 13 to 27 percent by weight. .Iaddend..Iadd. 19. The depolarizing mix of claim 17, wherein the concentration of zinc chloride in the electrolyte is about 13 to 27 percent by weight. .Iaddend..Iadd. 20. The depolarizing mix of claim 15, wherein the weight ratio of manganese dioxide to acetylene black is about 4/1 to 7/1. .Iaddend..Iadd. 21. The depolarizing mix of claim 17, wherein the weight ratio of manganese dioxide to acetylene black is about 4/1 to 7/1. .Iaddend.
References Cited (Backward Citations)
US1292764A
Cited
DE1069726B
Cited
US3019141A
Cited
US3098771A
Cited
US3428494A
Cited
US3440104A
Cited
FR1558934A
Cited
GB1170480A
Cited
US3795545A
Cited
US3888699A
Cited
US3892591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |