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US3753779A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of making zinc electrodes

Assignee: Leesona Corp
•
Filing: 1968-06-14
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Granted: 1973-08-21
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Expires: 1988-06-14
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Abstract

Abstract Improved anodes comprising dendritic zinc suitable for use in electrochemical devices such as primary and secondary cells and methods for preparing the anodes are disclosed. These methods are: (1) coating a porous support with, or shaping an electrode from already-prepared zinc dendrites; (2) in situ reduction of a porous substrate coated with a zinc compound; and (3) electrodeposition of zinc dendrites from a solution of a zinc compound onto a porous support. The above methods include various washing steps which prevent side reactions between the zinc dendrites and other substances which may be present during the production and use of the anodes. Various molding and shaping steps may also be included, and in situ amalgamation, or amalgamation of the finished anodes is generally desirable. These anodes have unusually high surface area, porosity and efficiency.

Inventors

  • 👤 J Franko
  • 👤 W Ryan

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 04:33
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 19 words
The method according to claim 1 wherein a minor amount of zinc dust is mixed with the zinc compound.
Claim 2
Dependent Claim 19 words
The method according to claim 1 wherein a minor amount of mercuric oxide is mixed with the zinc compound.
Claim 3
Dependent Claim 13 words
The method according to claim 1 wherein the zinc compound is zinc oxide.
Claim 4
Dependent Claim 30 words
The method according to claim 1 wherein said substrate is porous and is coated in an electrochemical reduction cell, said substrate being the cathode of said cell during said coating.

References Cited (Backward Citations)

US1127911A Cited
US2640864A Cited
US2820077A Cited
US2880258A Cited
US2865974A Cited
US3368925A Cited
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US3378406A Cited
US3493434A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-08-20 1977-02-19 1977-08-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-20 1981-02-19 1981-08-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-20 1985-02-19 1985-08-21 $7700.00 Window Closed / Lapsed

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