US3873367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc-container electrode
Assignee: RWE AG
•
Filing: 1973-03-12
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Granted: 1975-03-25
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Expires: 1993-03-12
Abstract
Abstract A negative electrode for an alkaline accumulator comprises a central conductive support and an electrochemically effective mass adhering to that support on opposite sides thereof, this mass consisting of active material in the form of zinc and/or zinc compounds mixed with a reactant such as calcium hydroxide. The mass forms a stack of three layers on each side of the support, i.e., an inner layer with the active material predominating and an intermediate layer with the reactant predominating and an outer layer consisting exclusively of the reactant. The latter may penetrate into interstices of a porous synthetic-resin covering, such as a nylon wrapper, surrounding the electrode body.
Inventors
- 👤 Ludwig Kandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:50
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/244; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A NEGATIVE ELECTRODE FOR AN ALKALINE STORAGE CELL, COMPRISING ACTIVE MATERIAL, SELECTED FROM THE GROUP WHICH CONSISTS OF METALLIC ZINC AND ZINC COMPOUNDS, MIXED WITH A FURTHER COMPOUND OF AN ALKALINE-EARTH REACTANT CAPABLE OF FORMING LOWSOLUBILITY ZINCATES UPON THE PASSAGE OF ZINC INTO SOLUTION ON DISCHARGE OF THE ELECTRIDE, THE PROPORTION OF SAID ACTIVE MATERIAL DECREASING OUTWARDLY FROM THE INTERIOR OF SAID MASS TO ZERO AT THE EXTERIOR THEREOF AND THE PROPORTION OF SAID REACTANT
Claim 2
Dependent Claim
75 words
A NEGATIVE ELECTRODE FOR AN ALKALINE STORAGE CELL, COMPRISING ACTIVE MATERIAL, SELECTED FROM THE GROUP WHICH CONSISTS OF METALLIC ZINC AND ZINC COMPOUNDS, MIXED WITH A FURTHER COMPOUND OF AN ALKALINE-EARTH REACTANT CAPABLE OF FORMING LOWSOLUBILITY ZINCATES UPON THE PASSAGE OF ZINC INTO SOLUTION ON DISCHARGE OF THE ELECTRIDE, THE PROPORTION OF SAID ACTIVE MATERIAL DECREASING OUTWARDLY FROM THE INTERIOR OF SAID MASS TO ZERO AT THE EXTERIOR THEREOF AND THE PROPORTION OF SAID REACTANT
Claim 3
Dependent Claim
12 words
The electrode defined in claim 1 wherein said reactant is calcium hydroxide.
Claim 4
Dependent Claim
22 words
The electrode defined in claim 1, further comprising a conductive support, said mass being symmetrically distributed on opposite sides of said support.
Claim 5
Dependent Claim
15 words
The electrode defined in claim 3, further comprising a porous synthetic-resin covering surrounding said mass.
Claim 6
Dependent Claim
27 words
The electrode defined in claim 4, further comprising spacer means projecting through said mass and carried by said support while holding said covering away from said support.
Claim 7
Dependent Claim
20 words
The electrode defined in claim 5 wherein the pores of said covering are at least partly filled with said reactant.
Claim 8
Dependent Claim
34 words
The electrode defined in claim 1 wherein said mass is divided into a plurality of layers containing said active material and said reactant in different proportions, the outermost layer consisting exclusively of said reactant.
Claim 9
Dependent Claim
110 words
A negative electrode for an alkaline storage cell, comprising a generally flat conductive support and an electrochemically effective mass composed of active material mixed with calcium hydroxide, said active material being selected from the group which consists of zinc and zinc compounds; said mass being divided into two stacks of layers separated by said support, the layers of each stack including an inner layer lying against said suppOrt, an intermediate layer overlying said inner layer, and an outer layer overlying said intermediate layer; said inner layer containing a preponderance of said active material, said intermediate layer containing a preponderance of calcium hydroxide, said outer layer consisting exclusively of calcium hydroxide.
Claim 10
Dependent Claim
110 words
A negative electrode for an alkaline storage cell, comprising a generally flat conductive support and an electrochemically effective mass composed of active material mixed with calcium hydroxide, said active material being selected from the group which consists of zinc and zinc compounds; said mass being divided into two stacks of layers separated by said support, the layers of each stack including an inner layer lying against said suppOrt, an intermediate layer overlying said inner layer, and an outer layer overlying said intermediate layer; said inner layer containing a preponderance of said active material, said intermediate layer containing a preponderance of calcium hydroxide, said outer layer consisting exclusively of calcium hydroxide.
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |