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US3640772A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of producing an electrode for alkaline batteries

Assignee: Svenska Ackumulator Jungner AB
•
Filing: 1969-06-03
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Granted: 1972-02-08
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Expires: 1989-06-03
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Abstract

Abstract A method for producing electrodes for alkaline batteries, the steps of which comprise pressing a dry pulverized mixture of an electrochemically active material, a conductive inert material and an organic bonding agent onto an electrically conductive base, said electrochemically active material having been first treated with a solution of an electrolyte-resistant polymer in the solvent, removing the solvent from the polymer-treated active material, grinding the polymer-treated active material into a suitable particle size, mixing said ground polymer-treated active material with an inert conductive material of the same composition in a larger quantity by weight than the aforesaid conductive material, and pressing the resulting mixture onto an electrically conductive base and into a continuous accumulator grid.

Inventors

  • 👤 Sven Uno Falk
  • 👤 Lars-Goran Alfelt

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 14:27
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; H01M4/30; Y; Y02; Y02E; Y02E60/00; Y02E60/10

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 12 words
The method of claim 1, wherein the electrolyte-resistant polymer is cold weldable.
Claim 2
Dependent Claim 33 words
The method of claim 1, wherein the electrochemically active material is a member selected from the group consisting of the oxide of nickel, cobalt, cadmium, iron, zinc, silver and mixtures of the same.
Claim 3
Dependent Claim 34 words
The method of claim 1, wherein the electrochemically active material is a member selected from the group consisting of the hydrated oxides of nickel, cobalt, cadmium, iron, zinc, silver and mixtures of the same.
Claim 4
Dependent Claim 11 words
The method of claim 1, wherein the electrolyte-resistant polymer is polyolefin.
Claim 5
Dependent Claim 17 words
The method of claim 1, wherein the pressing of the electrodes is carried out at room temperature.
Claim 6
Dependent Claim 32 words
The method of claim 1, wherein the content of the electrolyte-resistant polymer ranges from 5 to 12 percent by weight of the polymer-containing mixture of the electrochemically active and conductive inert material.
Claim 7
Dependent Claim 12 words
The method of claim 1, wherein the solvent is an aromatic hydrocarbon.
Claim 8
Dependent Claim 21 words
The method of claim 8, wherein the aromatic hydrocarbon is a member selected from the group consisting of xylene and toluene.
Claim 9
Dependent Claim 20 words
The method of claim 5, wherein the polyolefin is a member selected from the group consisting of polyethylene and polypropylene.

References Cited (Backward Citations)

US3060254A Cited
US3024296A Cited
US3121029A Cited
US3184339A Cited
US3120457A Cited
US3347668A Cited
US3282738A Cited
US3457113A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-02-07 1975-08-09 1976-02-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-02-07 1979-08-09 1980-02-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-02-07 1983-08-09 1984-02-08 $7700.00 Window Closed / Lapsed

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