US4297420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode for a lead accumulator
Assignee: Alcatel Lucent SAS
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Filing: 1980-09-24
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Granted: 1981-10-27
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Expires: 2000-09-24
Abstract
Abstract The invention relates to an electrode for a lead accumulator. It includes an electronically conductive core coated with an active material which contains grains of lead monoxide, lead sulphate and a binding agent which is suitable for forming a three-dimensional thread-like network, characterized in that said electrode further includes a material which is insoluble in sulphuric acid and permeable to conductivity ions, the material being chosen from the group which includes polyacrylic acid and hydroxyethylmethacrylate and being used in a proportion by weight of 0.25 to 2% with respect to said lead monoxide.
Inventors
- 👤 Bernard Chenaux
- 👤 Alain Leroux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:11
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/14; H01M4/16; H01M4/20; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
An electrode for a lead accumulator of the type which includes an electronically conductive core coated with an active material which contains grains of lead monoxide, lead sulphate and a binding agent which is suitable for forming a three-dimensional network of fibres, wherein said electrode further includes a material which is insoluble in sulphuric acid, is permeable to conductivity ions and forming a film over said grains, the material being chosen from the group which includes polyacrylic acid and hydroxyethylmethacrylate and being used in a proportion by weight of 0.25 to 2% with respect to said lead monoxide.
Claim 2
Dependent Claim
98 words
An electrode for a lead accumulator of the type which includes an electronically conductive core coated with an active material which contains grains of lead monoxide, lead sulphate and a binding agent which is suitable for forming a three-dimensional network of fibres, wherein said electrode further includes a material which is insoluble in sulphuric acid, is permeable to conductivity ions and forming a film over said grains, the material being chosen from the group which includes polyacrylic acid and hydroxyethylmethacrylate and being used in a proportion by weight of 0.25 to 2% with respect to said lead monoxide.
Claim 3
Dependent Claim
32 words
An electrode according to claim 1, wherein said binding agent contains polytetrafluoroethylene and is used in a proportion by weight which lies between 1 and 5% with respect to the lead monoxide.
Claim 4
Dependent Claim
14 words
An accumulator which includes at least one electrode according to claim 1 or 2.
References Cited (Backward Citations)
FR1080243A
Cited
US2866840A
Cited
US3496020A
Cited
FR2093264A5
Cited
US3918989A
Cited
US3871918A
Cited
FR2279231B1
Cited
US4168352A
Cited
US4146685A
Cited
US4175052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |