US4448862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead storage battery
Assignee: VARTA Batterie AG
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Filing: 1981-02-06
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Granted: 1984-05-15
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Expires: 2001-02-06
Abstract
Abstract The coating of the microporous separators of lead storage batteries with a highly porous glass wool mat on the side facing the negative electrode plates promotes the electrolyte exchange at these plates and also counteracts the tendency toward crumbling and toward the formation of spongy lead (mossing). The glass wool mat may be applied in the form of a plate or a slab to conventionally made separators or it may take the form of a pocket into which the negative electrode plate is inserted.
Inventors
- 👤 Heinz Schulte
- 👤 Werner Kirchhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:40
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/06; H01M10/12; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
43 words
A lead storage battery with positive and negative electrode plates between which are positioned the microporous separators, comprising: on each separator, an additional hydrogen and acid resistant layer of high porosity glass wool mat applied only to the side facing the negative plate.
Claim 2
Dependent Claim
43 words
A lead storage battery with positive and negative electrode plates between which are positioned the microporous separators, comprising: on each separator, an additional hydrogen and acid resistant layer of high porosity glass wool mat applied only to the side facing the negative plate.
Claim 3
Dependent Claim
17 words
The battery of claim 1 wherein the additional layer has a thickness of 0.2 to 1.0 mm.
Claim 4
Dependent Claim
12 words
The battery of claim 2 wherein the thickness is about 0.3 mm.
Claim 5
Dependent Claim
26 words
The battery of claim 1 wherein the additional layer surrounds the negative electrode in the form of a pocket into which the negative electrode is inserted.
Claim 6
Dependent Claim
24 words
The battery of claim 1 wherein the separators are formed of a connecting spacer of microporous separator foil and glass wool mat applied thereto.
Claim 7
Dependent Claim
37 words
The battery of claim 1 wherein the separator is of microporous rubber or plastic foil and is provided with means for spacing it from the adjacent positive electrode, the additional layer being directly adjacent the negative plate.
Claim 8
Dependent Claim
30 words
The battery of claim 6 wherein the spacing means between separator and positive plate are lands or ribs, while the side of the separator toward the negative plate is smooth.
Claim 9
Dependent Claim
21 words
The battery of claim 7 wherein the additional layer is between the negative plate and the smooth side of the separator.
Claim 10
Dependent Claim
92 words
A lead storage battery with positive and negative electrode plates between which are positioned the microporous separators, comprising: on each separator, an additional hydrogen and acid resistant layer of high porosity glass wool mat applied only to the side facing the negative plate, the separator being provided with lands or ribs for spacing it from the adjacent positive electrode, while the side of the separator toward the negative plate is smooth, and the additional layer being directly adjacent the negative plate between that negative plate and the smooth side of the separator.
Claim 11
Dependent Claim
92 words
A lead storage battery with positive and negative electrode plates between which are positioned the microporous separators, comprising: on each separator, an additional hydrogen and acid resistant layer of high porosity glass wool mat applied only to the side facing the negative plate, the separator being provided with lands or ribs for spacing it from the adjacent positive electrode, while the side of the separator toward the negative plate is smooth, and the additional layer being directly adjacent the negative plate between that negative plate and the smooth side of the separator.
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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |