Patent US4216280A successfully refreshed from Google Patents.
US4216280A
Expired / Lapsed
US
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Glass fiber separator for storage batteries
Assignee: Yuasa Corp
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Filing: 1979-06-15
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Granted: 1980-08-05
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Expires: 1999-06-15
Abstract
Abstract Separators for storage batteries, particularly separators for sealed lead-acid storage batteries, comprise glass fibers entangled in the shape of a sheet without the use of a binder, a first portion being glass fibers having a fiber diameter smaller than 1 micron and a second portion being glass fibers having a fiber diameter larger than 5 microns, preferably larger than 10 microns, as well as an average fiber length of at least 5 mm. The inventive separators have high electrolyte retention, good mechanical strength, and good shape recovery.
Inventors
- 👤 Migaki Kono
- 👤 Hideaki Igarashi
- 👤 Kenjiro Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:02
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/489; H01M50/491; H01M50/494; H01M50/497; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
A separator for storage batteries comprising a sheet of entangled glass fibers, said glass fibers including 50% to 95% by weight of first glass fibers having a fiber diameter of smaller than 1 micron and 5% to 50% by weight of second glass fibers having a fiber diameter of larger than 5 microns and a fiber length of at least 5mm, said sheet including no binder.
Claim 2
Dependent Claim
66 words
A separator for storage batteries comprising a sheet of entangled glass fibers, said glass fibers including 50% to 95% by weight of first glass fibers having a fiber diameter of smaller than 1 micron and 5% to 50% by weight of second glass fibers having a fiber diameter of larger than 5 microns and a fiber length of at least 5mm, said sheet including no binder.
Claim 3
Dependent Claim
44 words
The separator for storage batteries according to claim 1 wherein said second glass fibers having a fiber diameter of larger than 5 microns and a fiber length of at least 5 mm include glass fibers having a fiber diameter of 10 to 30 microns.
Claim 4
Dependent Claim
23 words
The separator for storage batteries according to claim 1 including organic fibrous materials in a range of from 0.1% to 5% by weight.
Claim 5
Dependent Claim
18 words
The separator for storage batteries according to claim 3 wherein said organic fibrous materials are natural fibrous materials.
Claim 6
Dependent Claim
23 words
The separator for storage batteries according to claim 2 including organic fibrous materials in a range of from 0.1% to 5% by weight.
References Cited (Backward Citations)
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US3862861B1
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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) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |