US4306005A
Expired / Lapsed
US
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Alkaline primary cell with cathode of potassium permanganate with lithium hydroxide
Assignee: Individual
•
Filing: 1980-08-27
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Granted: 1981-12-15
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Expires: 2000-08-27
Abstract
Abstract The invention is a cathodic reactant for alkaline primary cells. It comprises intimately intermixed finely divided potassium permanganate and graphite, having added thereto a substantial quantity of powdered lithium hydroxide.
Inventors
- 👤 Samuel Ruben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:56
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M4/00; H01M4/02; H01M4/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
27 words
A cathodic reactant for sealed primary alkaline cells comprising intimately intermixed finely divided potassium permanganate and graphite having added thereto a substantial quantity of lithium hydroxide powder.
Claim 2
Dependent Claim
27 words
A cathodic reactant for sealed primary alkaline cells comprising intimately intermixed finely divided potassium permanganate and graphite having added thereto a substantial quantity of lithium hydroxide powder.
Claim 3
Dependent Claim
15 words
The cathodic reactant of claim 1 characterized in that it consists preponderently of potassium permanganate.
Claim 4
Dependent Claim
29 words
The cathodic reactant of claim 1 characterized in that the amount of lithium hydroxide powder is in the order of 5% to 25% by weight of the cathodic reactant.
Claim 5
Dependent Claim
24 words
The cathodic reactant of claim 1 characterized in that the amount of lithium hydroxide powder added to the potassium permanganate-graphite mixture is approximately 20%.
Claim 6
Dependent Claim
41 words
A sealed alkaline primary cell comprising a cathodic reactant of intimately intermixed finely divided potassium permanganate and graphite having added thereto a substantial quantity of lithium hydroxide powder, an anode of amalgamated zinc and an aqueous electrolyte of zincated lithium hydroxide.
Claim 7
Dependent Claim
41 words
A sealed alkaline primary cell comprising a cathodic reactant of intimately intermixed finely divided potassium permanganate and graphite having added thereto a substantial quantity of lithium hydroxide powder, an anode of amalgamated zinc and an aqueous electrolyte of zincated lithium hydroxide.
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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |