Patent US4004944A successfully refreshed from Google Patents.
US4004944A
Expired / Lapsed
US
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Electrode material for accumulators and other electrochemical sources of current
Assignee: Prazska Akumulatorka Narodni Podnik
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Filing: 1975-07-28
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Granted: 1977-01-25
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Expires: 1995-07-28
Abstract
Abstract An improved active electrode composition for a plastic-bonded electrode of an electrochemical accumulator is described. A powder of the principal electrode active material is mixed with 1.5 - 60% by weight of oxalic and/or a salt thereof. The admixture of such ingredients with a suitable binding agent may then be applied to an expanded metallic collector and then heat and pressure treated in a conventional manner to obtain the required electrode.
Inventors
- 👤 Josef Sandera
- 👤 Milan Calabek
- 👤 Miroslav Cenek
- 👤 Vojtech Koudelka
- 👤 Oldrich Kouril
- 👤 Jiri Malik
- 👤 Josef Vanacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:45
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; H01M4/74; H01M4/745; H01M4/24; H01M4/62; H01M4/621; H01M4/622; H01M2004/026; H01M2004/027; H01M4/66; H01M4/661; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
An improved active composition of a completed plastic-bonded electrode in an electrochemical current source, the composition consisting essentially of (1) a powdered base active material selected from the group consisting of cadmium, nickel, zinc and zinc oxide, (2) a binding agent, and (3) a substance selected from the group consisting of oxalic acid and a salt thereof, the last-mentioned substance being present in the composition in the range of 1.5-60% by weight.
Claim 2
Dependent Claim
72 words
An improved active composition of a completed plastic-bonded electrode in an electrochemical current source, the composition consisting essentially of (1) a powdered base active material selected from the group consisting of cadmium, nickel, zinc and zinc oxide, (2) a binding agent, and (3) a substance selected from the group consisting of oxalic acid and a salt thereof, the last-mentioned substance being present in the composition in the range of 1.5-60% by weight.
Claim 3
Dependent Claim
15 words
A composition as defined in claim 1, in which the base active material is cadmium.
Claim 4
Dependent Claim
16 words
A composition as defined in claim 1, in which the base active material is zinc oxide.
Claim 5
Dependent Claim
15 words
A composition as defined in claim 1, in which the binding agent is pulverized polyethelene.
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |