Patent US4233379A successfully refreshed from Google Patents.
US4233379A
Expired / Lapsed
US
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Separator for starved electrolyte lead/acid battery
Assignee: Johns Manville Corp
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Filing: 1979-05-17
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Granted: 1980-11-11
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Expires: 1999-05-17
Abstract
Abstract Compositions and papers made therefrom useful as separator materials in starved electrolyte lead/acid batteries are described. The compositions comprise a mixture of 30% to 80% by weight of perlite and 20% to 70% by weight of glass fibers. The glass fibers have diameters in the range of from 0.3 to 1.0 micrometers while the perlite has particle sizes in the range of from about 3 to about 100 micrometers.
Inventors
- 👤 Stephen E. Gross
- 👤 Clifford W. Cain, Jr.
- 👤 Paul D. Bilawsky
- 👤 Norman B. Scheffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:47
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/446; H01M50/431; H01M50/434; H01M50/437; H01M50/44; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A composition, useful as a separator material in starved electrolyte lead/acid batteries, which comprises a mixture of 30% to 80% by weight of expanded perlite and 20% to 70% by weight of glass fiber, said glass fibers having diameters in the range of from about 0.3 to about 1.0 micrometers and said perlite having particle sizes in the range of from about 3 to about 100 micrometers.
Claim 2
Dependent Claim
67 words
A composition, useful as a separator material in starved electrolyte lead/acid batteries, which comprises a mixture of 30% to 80% by weight of expanded perlite and 20% to 70% by weight of glass fiber, said glass fibers having diameters in the range of from about 0.3 to about 1.0 micrometers and said perlite having particle sizes in the range of from about 3 to about 100 micrometers.
Claim 3
Dependent Claim
16 words
A composition as in claim 1 consisting essentially of said expanded perlite and said glass fibers.
Claim 4
Dependent Claim
40 words
A composition as in claims 1 or 2 wherein said expanded perlite is present as from 50% to 70% by weight of the composition and said glass fiber is present as from 30% to 50% by weight of the composition.
Claim 5
Dependent Claim
26 words
A composition as in claims 1 or 2 wherein said expanded perlite has particle sizes in the range of from about 10 to about 35 micrometers.
Claim 6
Dependent Claim
21 words
A paper useful as separator material in a starved electrolyte lead/acid battery comprising the composition of claim 1 in matted form.
Claim 7
Dependent Claim
21 words
A paper useful as separator material in a starved electrolyte lead/acid battery comprising the composition of claim 2 in matted form.
Claim 8
Dependent Claim
21 words
A paper useful as separator material in a starved electrolyte lead/acid battery comprising the composition of claim 3 in matted form.
Claim 9
Dependent Claim
21 words
A paper useful as separator material in a starved electrolyte lead/acid battery comprising the composition of claim 4 in matted form.
Claim 10
Dependent Claim
17 words
A battery separator for a starved electrolyte lead/acid battery formed from a paper as in claim 5.
Claim 11
Dependent Claim
17 words
A battery separator for a starved electrolyte lead/acid battery formed from a paper as in claim 6.
Claim 12
Dependent Claim
17 words
A battery separator for a starved electrolyte lead/acid battery formed from a paper as in claim 7.
Claim 13
Dependent Claim
17 words
A battery separator for a starved electrolyte lead/acid battery formed from a paper as in claim 8.
References Cited (Backward Citations)
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US3085126A
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US3862861A
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US4150199A
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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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |