US4163829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic reducing additives for solid cathodes for use in nonaqueous cells
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1977-11-14
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Granted: 1979-08-07
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Expires: 1997-11-14
Abstract
Abstract The invention relates to nonaqueous cells employing an anode, a cathode and an electrolyte wherein the cathode comprises an active cathode material, carbon and/or graphite, and an amount of a metallic reducing agent to reduce any materials in the cell which are more cathodic (positive) than the active cathode material with respect to the cell's working anode.
Inventors
- 👤 Marvin L. Kronenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/36; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
73 words
A nonaqueous cell having an anode, an electrolyte comprising an organic solvent and a solute, and a solid cathode, said solid cathode comprising a major amount of solid active material, a minor amount of graphite and/or carbon, and a minor amount of a metallic reducing agent, said metallic reducing agent being sufficient to reduce any materials in the cell which are more cathodic than the active cathode material with respect to the anode.
Claim 2
Dependent Claim
73 words
A nonaqueous cell having an anode, an electrolyte comprising an organic solvent and a solute, and a solid cathode, said solid cathode comprising a major amount of solid active material, a minor amount of graphite and/or carbon, and a minor amount of a metallic reducing agent, said metallic reducing agent being sufficient to reduce any materials in the cell which are more cathodic than the active cathode material with respect to the anode.
Claim 3
Dependent Claim
16 words
The nonaqueous cell of claim 1 wherein the metallic reducing agent is incorporated throughout the cathode.
Claim 4
Dependent Claim
23 words
The nonaqueous cell of claim 1 wherein the metallic reducing agent is a discrete material in electrical and ionic contact with the cathode.
Claim 5
Dependent Claim
36 words
The nonaqueous cell of claim 1 wherein the metallic reducing agent is selected from the group consisting of zinc, vanadium, manganese, chromium, iron, cadmium, indium, tin, lead, zirconium, titanium, lithium, sodium, potassium, magnesium, aluminum and calcium.
Claim 6
Dependent Claim
12 words
The nonaqueous cell of claim 4 wherein the metallic agent is zinc.
Claim 7
Dependent Claim
84 words
The nonaqueous cell of claim 1 wherein the active cathode material is selected from the group consisting of CF x , V 2 O 5 , WO 3 , MoO 3 , lead oxides, cobalt oxides, MnO 2 , copper oxides, CuS, CoS 2 , In 2 S 3 , iron sulfides, NiS, Ag 2 CrO 4 , Ag 3 PO 4 and CuSO 4 and wherein the anode is selected from the group consisting of lithium, sodium, potassium, calcium, magnesium and alloys thereof.
Claim 8
Dependent Claim
19 words
The nonaqueous cell of claim 6 wherein the active cathode material is FeS 2 and the anode is lithium.
Claim 9
Dependent Claim
19 words
The nonaqueous cell of claim 6 wherein the active cathode material is copper oxide and the anode is lithium.
Claim 10
Dependent Claim
19 words
The nonaqueous cell of claim 6 wherein the active cathode material is lead oxide and the anode is lithium.
Claim 11
Dependent Claim
19 words
The nonaqueous cell of claim 6 wherein the active cathode material is copper sulfide and the anode is lithium.
Claim 12
Dependent Claim
19 words
The nonaqueous cell of claim 6 wherein the active cathode material is MnO 2 and the anode is lithium.
Claim 13
Dependent Claim
14 words
The nonaqueous cell of claim 6 wherein the metallic reducing agent is zinc powder.
Claim 14
Dependent Claim
15 words
The nonaqueous cell of claim 6 wherein the metallic reducing agent is a zinc strip.
Claim 15
Dependent Claim
12 words
The nonaqueous cell of claim 13 wherein the zinc strip is perforated.
Claim 16
Dependent Claim
15 words
The nonaqueous cell of claim 6 wherein the metallic reducing agent is a zinc screen.
References Cited (Backward Citations)
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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) | 1982-08-06 | 1983-02-05 | 1983-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-06 | 1987-02-05 | 1987-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-06 | 1991-02-05 | 1991-08-07 | $7700.00 | Window Closed / Lapsed |