Patent US3940536A successfully refreshed from Google Patents.
US3940536A
Expired / Lapsed
US
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Mechanically reinforced high porosity partially fused glass fiber galvanic separator
Assignee: Compagnie Europeenne dAccumulateurs SA
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Filing: 1973-07-03
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Granted: 1976-02-24
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Expires: 1993-07-03
Abstract
Abstract A separator for a galvanic element wherein partially fused glass fibers are coated by a coating consisting of grains of thermo-hardening synthetic material immersed in a natural or synthetic latex to mechanically reinforce the knots in the glass fiber network resulting from partial fusion of the glass fibers without blocking the pores of the partially fused fiber network.
Inventors
- 👤 Johann Pitsch
- 👤 Pierre Lasserre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:09
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/431; H01M50/434; H01M50/437; H01M2300/00; H01M2300/0002; H01M2300/0005; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2982
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
In a separator for a galvanic element comprising glass fibers agglomerated by partial fusion and having a diameter of a few microns, the improvement comprising: a thermal hardened coating on said agglomerated fibers, said coating consisting of grains of thermo-hardened, synthetic material immersed in a natural or synthetic latex; said synthetic material and said natural or synthetic latex being in sufficient amount such that said thermal hardened coating of grains of thermo-hardened synthetic material immersed in said natural or synthetic latex acts to mechanically reinforce the knots in the glass fiber network resulting from partial fusion of the glass fibers without blocking the pores of the partially fused fiber network.
Claim 2
Dependent Claim
110 words
In a separator for a galvanic element comprising glass fibers agglomerated by partial fusion and having a diameter of a few microns, the improvement comprising: a thermal hardened coating on said agglomerated fibers, said coating consisting of grains of thermo-hardened, synthetic material immersed in a natural or synthetic latex; said synthetic material and said natural or synthetic latex being in sufficient amount such that said thermal hardened coating of grains of thermo-hardened synthetic material immersed in said natural or synthetic latex acts to mechanically reinforce the knots in the glass fiber network resulting from partial fusion of the glass fibers without blocking the pores of the partially fused fiber network.
Claim 3
Dependent Claim
31 words
A separator for a galvanic element according to claim 1, characterized in that the grains of thermo-hardening material are selected from the phenolic resins, the melamines, polystyrenes, polyesters or epoxy resins.
Claim 4
Dependent Claim
20 words
A separator for a galvanic element according to claim 2, characterized in that the thermo-hardening material is a phenol-formaldehyde resin.
Claim 5
Dependent Claim
18 words
A separator for a galvanic element according to claim 2, characterized in that the latex is a copolymer-styrene-butadiene.
Claim 6
Dependent Claim
66 words
A process for the manufacture of a separator comprising the steps of: agglomerating by partial fusion glass fibers having a diameter of a few microns, coating said agglomerated fibers with a coating comprising equal parts of a thermo-hardening resin in an aqueous solution and synthetic latex dispersed in water, and drying said coated separator in a drying oven to dry the latex and polymerize the resin.
Claim 7
Dependent Claim
66 words
A process for the manufacture of a separator comprising the steps of: agglomerating by partial fusion glass fibers having a diameter of a few microns, coating said agglomerated fibers with a coating comprising equal parts of a thermo-hardening resin in an aqueous solution and synthetic latex dispersed in water, and drying said coated separator in a drying oven to dry the latex and polymerize the resin.
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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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |