Patent US4359511A successfully refreshed from Google Patents.
US4359511A
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US
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Battery separator material
Assignee: Emhart Industries Inc
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Filing: 1981-12-28
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Granted: 1982-11-16
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Expires: 2001-12-28
Abstract
Abstract A battery separator material which is folded to form an envelope is heat sealed along at least two opposing edges thereof to form a battery separator. The separator material is comprised of discrete polyolefin pulp fibers in a sufficient amount to heat seal the separator along its edges. The fibers are bound by an organic polymeric binder. A process of forming the battery separator is also disclosed.
Inventors
- 👤 Stanley J. Strzempko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:58
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/489; H01M50/491; H01M50/494; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
43 words
A battery separator material comprised of: discrete polyolefin pulp fibers in a sufficient amount to enable the battery separator material to be heat sealed to itself along its edges; said fibers being bound by an organic polymeric binder to form a sheet material.
Claim 2
Dependent Claim
43 words
A battery separator material comprised of: discrete polyolefin pulp fibers in a sufficient amount to enable the battery separator material to be heat sealed to itself along its edges; said fibers being bound by an organic polymeric binder to form a sheet material.
Claim 3
Dependent Claim
30 words
The material of claim 1 wherein said polyolefin pulp fibers are present at a level of 30 to 100 percent by weight based on the nonbinder content of said material.
Claim 4
Dependent Claim
20 words
The material of claim 2 wherein said polyolefin pulp fibers are present at a level of 70 to 90 percent.
Claim 5
Dependent Claim
18 words
The material of claim 1 wherein said polyolefin pulp fibers have a length of up to 0.5 ins.
Claim 6
Dependent Claim
18 words
The material of claim 1 wherein said polyolefin pulp fibers have a diameter of up to 20 microns.
Claim 7
Dependent Claim
8 words
The material of claim 1 including glass fibers.
Claim 8
Dependent Claim
29 words
The material of claim 6 wherein said glass fibers are present at a level of up to 60 percent by weight based on the nonbinder content of said material.
Claim 9
Dependent Claim
21 words
The material of claim 7 wherein said glass fibers are present at a level of 5 to 15 percent by weight.
Claim 10
Dependent Claim
14 words
The material of claim 1 wherein said organic polymeric binder is an acrylic polymer.
Claim 11
Dependent Claim
11 words
The material of claim 9 wherein said acrylic polymer is self-crosslinked.
Claim 12
Dependent Claim
28 words
The material of claim 1 wherein said polymeric binder is present at a level of 5 to 30 percent add-on based upon the nonbinder content of said material.
Claim 13
Dependent Claim
9 words
The material of claim 1 including a particulate filler.
Claim 14
Dependent Claim
18 words
The material of claim 12 wherein said particulate filler has a particle size of 0.02 to 20 micrometers.
Claim 15
Dependent Claim
11 words
The material of claim 12 wherein said particulate filler is inorganic.
Claim 16
Dependent Claim
10 words
The material of claim 14 wherein said filler is silica.
Claim 17
Dependent Claim
19 words
The material of claim 1 including staple fibers selected from the group consisting of polyester and polyolefin staple fibers.
Claim 18
Dependent Claim
30 words
The material of claim 16 wherein said polyester or polyolefin staple fibers are present at a level of 5 to 15 percent based upon the nonbinder content of the material.
Claim 19
Dependent Claim
10 words
A battery separator constructed of the material of claim 1.
References Cited (Backward Citations)
US2653986A
Cited
US3351495A
Cited
US3730777A
Cited
US4024323A
Cited
US4245013A
Cited
US4265985A
Cited
US4224394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |