Patent US4367271A successfully refreshed from Google Patents.
US4367271A
Expired / Lapsed
US
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Storage battery separator
Assignee: Nippon Muki Co Ltd
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Filing: 1981-01-09
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Granted: 1983-01-04
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Expires: 2001-01-09
Abstract
Abstract A process for producing a storage battery separator including the mixing of at least 10 parts by weight of glass fiber having at least 1 m2/g in specific surface area, with a fibril-formed synthetic fiber which is no greater than 350 c.c. in freeness in which the resultant mixture is formed into a sheetlike member suitable for use as a storage battery separator.
Inventors
- 👤 Takao Hasegawa
- 👤 Wataru Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:10
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H13/00; D21H13/10; D21H13/12; D21H13/14; D21H13/36; D21H13/38; D21H13/40; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/446; H01M2300/00; H01M2300/0002; H01M2300/0005; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
60 words
A process for producing a storage battery separator comprising: mixing about 10 parts by weight of glass fiber which is at least 1 m 2 /g in specific surface area with about one part, by weight, of fibril-formed synthetic fiber which is 350 c.c. or less in freeness in which the resultant mixture may be formed into a sheetlike element.
Claim 2
Dependent Claim
60 words
A process for producing a storage battery separator comprising: mixing about 10 parts by weight of glass fiber which is at least 1 m 2 /g in specific surface area with about one part, by weight, of fibril-formed synthetic fiber which is 350 c.c. or less in freeness in which the resultant mixture may be formed into a sheetlike element.
Claim 3
Dependent Claim
74 words
A process for producing a storage battery separator comprising: mixing between 2 and 10% by weight of a fibril-formed synthetic fiber with between 90 and 98% by weight of a glass fiber having about 2 m 2 /g specific surface area, and subjecting the resultant mixture to a paper manufacturing process to thereby form a separator having a thickness of 0.2 mm-2 mm and a grammage of 30 g/m 2 -400 g/m 2 .
Claim 4
Dependent Claim
74 words
A process for producing a storage battery separator comprising: mixing between 2 and 10% by weight of a fibril-formed synthetic fiber with between 90 and 98% by weight of a glass fiber having about 2 m 2 /g specific surface area, and subjecting the resultant mixture to a paper manufacturing process to thereby form a separator having a thickness of 0.2 mm-2 mm and a grammage of 30 g/m 2 -400 g/m 2 .
Claim 5
Dependent Claim
46 words
The process for producing a storage battery separator as recited in claim 2, in which, as a yet further step, passing the separator through a heating furnace for melting the surface of the fibril-formed synthetic fiber and for bonding the surface of the glass fiber thereto.
Claim 6
Dependent Claim
64 words
A storage battery separator comprising: a mixture including at least 10 parts by weight of glass fiber which is at least 1 m 2 /g in specific surface area and at least one part by weight of a fibril-formed synthetic fiber, said fiber having a thermo-plastic resin monofilament which is beated to become a fibril-formed fiber having an adjusted freeness of between 100-350 c.c.
Claim 7
Dependent Claim
64 words
A storage battery separator comprising: a mixture including at least 10 parts by weight of glass fiber which is at least 1 m 2 /g in specific surface area and at least one part by weight of a fibril-formed synthetic fiber, said fiber having a thermo-plastic resin monofilament which is beated to become a fibril-formed fiber having an adjusted freeness of between 100-350 c.c.
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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |