US4238557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead acid battery plate with starch coated glass fibers
Assignee: VARTA Batterie AG
•
Filing: 1978-04-20
•
Granted: 1980-12-09
•
Expires: 1998-04-20
Abstract
Abstract The active mass of a lead storage battery plate containing an additive of glass fibers which were provided with a coating before being introduced into the mass.
Inventors
- 👤 Heinrich Schulte
- 👤 Werner Kirchhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:44
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/56; H01M4/57; H01M4/62; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
36 words
An electrode plate for lead storage batteries having a pasted-on active mass containing an additive of glass fibers, wherein the glass fibers have been provided with a starch coating before being added to the active mass.
Claim 2
Dependent Claim
36 words
An electrode plate for lead storage batteries having a pasted-on active mass containing an additive of glass fibers, wherein the glass fibers have been provided with a starch coating before being added to the active mass.
Claim 3
Dependent Claim
21 words
The electrode plate of claim 1, wherein the glass fibers are coated with about 1 to 5% by weight of starch.
Claim 4
Dependent Claim
20 words
The electrode plate of claim 2, wherein the glass fibers are coated with 2 to 3% by weight of starch.
Claim 5
Dependent Claim
24 words
The plate of claim 1, characterized in that the glass fiber content amounts to about 0.1 to 0.7% by weight of the lead utilized.
Claim 6
Dependent Claim
27 words
The plate of claim 4, characterized in that the glass fiber content amounts to 0.25 to 1.5% by weight, relative to the weight of the lead utilized.
Claim 7
Dependent Claim
28 words
The plate according to claim 1, wherein the glass fibers have a length of about 5 to 20 mm and a thickness of about 5 to 20 microns.
Claim 8
Dependent Claim
26 words
The plate according to claim 6, wherein the glass fibers have a length of 8 to 15 mm, and a thickness of 8 to 15 microns.
Claim 9
Dependent Claim
25 words
The plate of claim 1, wherein the glass fibers are selected from the group of staple glass fiber, spun glass yarn, and cut textile glass.
Claim 10
Dependent Claim
36 words
The cell of claim 1, wherein the glass fibers are of spun glass yarn, and wherein the starch has been coated upon them while they were in about finger-thick bundles, which were subsequently cut to length.
Claim 11
Dependent Claim
53 words
The plate of claim 1 wherein the starch coating has been provided by forming a slurry of starch with water, stirring the slurry into water at 95° to 100° C., preparing from this a starch paste, and immersing the glass fibers in this starch paste, allowing them to drip off and drying them.
Claim 12
Dependent Claim
23 words
The plate of claim 10 wherein the fraction by weight of the starch coating relative to the dry glass amounts to about 2.5%.
Claim 13
Dependent Claim
20 words
The plate of claim 11 wherein the glass fibers coated with starch are substantially uniformly distributed throughout the active mass.
Claim 14
Dependent Claim
35 words
The plate of claim 12 wherein the glass fibers coated with starch are mixed with the remainder of the active mass, the length of the glass fibers remaining substantially the same as before their admixture.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |