Patent US4400452A successfully refreshed from Google Patents.
US4400452A
Expired / Lapsed
US
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Laminar electrical cells and batteries
Assignee: Polaroid Corp
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Filing: 1981-12-24
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Granted: 1983-08-23
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Expires: 2001-12-24
Abstract
Abstract Laminar electrical cells and batteries of the Leclanche type, in which the electrolyte comprises an aqueous solution containing from about 18 to about 22 percent of NH 4 Cl and from about 25 to about 40 percent of ZnCl 2 by weight, based on the weight of solution. The electrolyte may contain a gelling agent, and may initially contain a minor amount of mercuric chloride.
Inventors
- 👤 Alan H. Bruder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:43
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/42; H01M6/46; H01M6/48; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A battery of laminar series connected electrical cells, said cells each comprising a zinc anode, a manganese dioxide cathode, and an electrolyte comprising an aqueous solution of NH 4 Cl and ZnCl 2 containing from 18 to 22 percent NH 4 Cl and from 25 to 40 percent ZnCl 2 by weight based on the weight of solution.
Claim 2
Dependent Claim
58 words
A battery of laminar series connected electrical cells, said cells each comprising a zinc anode, a manganese dioxide cathode, and an electrolyte comprising an aqueous solution of NH 4 Cl and ZnCl 2 containing from 18 to 22 percent NH 4 Cl and from 25 to 40 percent ZnCl 2 by weight based on the weight of solution.
Claim 3
Dependent Claim
23 words
The battery of claim 1, in which said electrolyte contains about 20 percent NH 4 Cl and about 30 percent ZnCl 2 .
Claim 4
Dependent Claim
99 words
A laminar electrical cell especially adapted for high current drains with variable duty cycles, comprising an anodic dispersion of zinc powder containing zinc oxide and adhered to a conductive plastic substrate with a binder, a cathodic dispersion of manganese dioxide and carbon particles in an aqueous electrolyte solution, and a separator between said anodic and cathodic dispersions, in which said electrolyte consists essentially of an aqueous solution of NH 4 Cl and ZnCl 2 containing from 18 to 22 percent of NH 4 Cl and from 25 to 40 percent of ZnCl 2 based on the weight of solution.
Claim 5
Dependent Claim
99 words
A laminar electrical cell especially adapted for high current drains with variable duty cycles, comprising an anodic dispersion of zinc powder containing zinc oxide and adhered to a conductive plastic substrate with a binder, a cathodic dispersion of manganese dioxide and carbon particles in an aqueous electrolyte solution, and a separator between said anodic and cathodic dispersions, in which said electrolyte consists essentially of an aqueous solution of NH 4 Cl and ZnCl 2 containing from 18 to 22 percent of NH 4 Cl and from 25 to 40 percent of ZnCl 2 based on the weight of solution.
Claim 6
Dependent Claim
25 words
The cell of claim 3, in which said solution contains about 20 percent of NH 4 Cl and about 30 percent of ZnCl 2 .
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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |