US3923544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc electrode and method of making same
Assignee: Whittaker Technical Products Inc
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Filing: 1974-03-11
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Granted: 1975-12-02
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Expires: 1994-03-11
Abstract
Abstract The present method provides an improved electrode for electrolytic cells which comprises, in combination, a porous metal grid, at least one solid strip of zinc metal disposed on said grid along an edge thereof, and a zinc oxide-containing shape-retaining particulate mixture covering at least one side of said grid and overlying said strip. The mixture includes a binder. A portion of the mixture overlying the grid has a density, for example, in excess of 2.5 grams per cc., which is higher than that of the remainder of the mixture. Preferably, a pair of solid zinc metal strips are disposed along the opposite edges of the grid and the mixture overlies both of the strips. Most preferably, the strips are wrapped around the edges and overlie opposite grid sides adjacent the edges. The strips may be about 2 - 15 mil thick each and have the advantage of preventing cell short circuiting, because of separator perforation, by the grid. They also obviate overcharging of the electrode and prevent electrode shape loss during use of the electrode. Such shape loss causes changes in electrical characteristics of the electrode.
Inventors
- 👤 Aldo S Berchielli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:12
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
AN IMPROVED ZINC ELECTRODE FOR ELECTROLYTIC CELLS, SAID ELECTRODE COMPRISING, IN COMBINATION: A. A POROUS METAL GRID; B. AT LEAST ONE SOLID STRIP OF ZINC METAL DISPOSED ON SAID GRID ALONG AN EDGE THEREOF; AND C. A ZINC OXIDE-CONTAINING SHAPE-RETAINING PARTICULATE MIXTURE INCLUDING A BINDER AND COVERING AT LEAST ONE SIDE OF SAID GRID AND OVERLYING SAID STRIP, THE PORTION OF SAID MIXTURE OVERLYING SAID STRIP HAVING A SUBSTANTIALLY HIGHER DENSITY THAN THE REMAINDER OF SAID MIXTURE.
Claim 2
Dependent Claim
77 words
AN IMPROVED ZINC ELECTRODE FOR ELECTROLYTIC CELLS, SAID ELECTRODE COMPRISING, IN COMBINATION: A. A POROUS METAL GRID; B. AT LEAST ONE SOLID STRIP OF ZINC METAL DISPOSED ON SAID GRID ALONG AN EDGE THEREOF; AND C. A ZINC OXIDE-CONTAINING SHAPE-RETAINING PARTICULATE MIXTURE INCLUDING A BINDER AND COVERING AT LEAST ONE SIDE OF SAID GRID AND OVERLYING SAID STRIP, THE PORTION OF SAID MIXTURE OVERLYING SAID STRIP HAVING A SUBSTANTIALLY HIGHER DENSITY THAN THE REMAINDER OF SAID MIXTURE.
Claim 3
Dependent Claim
16 words
The improved electrode of claim 1 wherein said higher density is in excess of 2.5 gm./cc.
Claim 4
Dependent Claim
29 words
The improved electrode of claim 1 wherein a pair of solid strips of zinc metal are disposed along opposite edges of said grid and said grid comprises noncorrodible metal.
Claim 5
Dependent Claim
20 words
The improved electrode of claim 3 wherein said mixture overlies opposite sides of said grid and both of said strips.
Claim 6
Dependent Claim
28 words
The improved electrode of claim 4 wherein the portion of said mixture which overlies each of said strips has a higher density than the remainder of said mixture.
Claim 7
Dependent Claim
16 words
The improved electrode of claim 5 wherein said higher density is in excess of 2.5 gm./cc.
Claim 8
Dependent Claim
30 words
The improved electrode of claim 1 wherein said strip is wrapped around said edge and overlies opposite sides of said grid adjacent said edge and wherein said grid comprises copper.
Claim 9
Dependent Claim
35 words
The improved electrode of claim 6 wherein each of said strips are about 2 - 15 mil thick, wherein said grid comprises silver and wherein said electrode is for use in an alkaline storage battery.
Claim 10
Independent Claim
95 words
A method of making an improved electrode for electrolytic cells, said method comprising: a. Disposing a solid strip of zinc metal along at least one edge of a porous metal grid; b. Applying a mixtUre comprising zinc oxide particles and binder to said grid and over said strip and pressing said mixture to a uniform thickness over said grid and to a thickness over said strip which is less than said thickness over said grid by the thickness of said strip; and c. Setting said mixture into a shape-retaining-form, whereby an improved electrode is provided.
Claim 11
Independent Claim
95 words
A method of making an improved electrode for electrolytic cells, said method comprising: a. Disposing a solid strip of zinc metal along at least one edge of a porous metal grid; b. Applying a mixtUre comprising zinc oxide particles and binder to said grid and over said strip and pressing said mixture to a uniform thickness over said grid and to a thickness over said strip which is less than said thickness over said grid by the thickness of said strip; and c. Setting said mixture into a shape-retaining-form, whereby an improved electrode is provided.
Claim 12
Dependent Claim
34 words
The method of claim 9 wherein a pair of said solid strips are disposed on opposite edges of said metal grid and wherein said mixture overlies both of said strips to a uniform thickness.
Claim 13
Dependent Claim
46 words
The method of claim 10 wherein each of said strips has a thickness of about 2 - 15 mil, wherein said grid comprises copper and wherein the density of the portion of said mixture overlying each of said strip is in excess of about 2.5 gm./cc.
Claim 14
Dependent Claim
29 words
The method of claim 9 wherein said strip is wrapped around said edge and overlies opposite sides of said grid adjacent said edge and wherein said grid comprises silver.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |