US4279978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separator employing zinc selective additive materials
Assignee: Fuelcell Energy Inc
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Filing: 1980-05-23
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Granted: 1981-07-21
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Expires: 2000-05-23
Abstract
Abstract A separator for use in an alkaline battery having a zinc electrode wherein the separator comprises a polyamide constituent, a wettable polymeric constituent and a filler material reactive with zinc.
Inventors
- 👤 Mark G. Dodin
- 👤 Allen Charkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/423; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
36 words
A battery separator for use with battery having an alkaline electrolyte and an electrode comprised of zinc active material, said separator including a polyamide constituent, a wettable polymeric constituent and a filler material reactive with zinc.
Claim 2
Dependent Claim
36 words
A battery separator for use with battery having an alkaline electrolyte and an electrode comprised of zinc active material, said separator including a polyamide constituent, a wettable polymeric constituent and a filler material reactive with zinc.
Claim 3
Dependent Claim
30 words
A separator in accordance with claim 1 wherein: said polymeric constituent has a pore size which is about one tenth or less than the pore size of said polyamide constituent.
Claim 4
Dependent Claim
41 words
A separator in accordance with claim 2 wherein: said polymeric constituent has a pore size in a range of about 20 to 50 Angstroms; and said polyamide constituent has a pore size in a range of about 500 to 1000 Angstroms.
Claim 5
Dependent Claim
15 words
A separator in accordance with claim 1 wherein: said polymeric constituent is a polyolefin oxide.
Claim 6
Dependent Claim
22 words
A separator in accordance with claim 1 wherein: said polymeric constituent is from about 5 to 50% by weight of said separator.
Claim 7
Dependent Claim
15 words
A separator in accordance with claim 1, wherein: said zinc reactive material is cerium dioxide.
Claim 8
Dependent Claim
48 words
A separator in accordance with claim 1 wherein: said zinc reactive material is selected from the group consisting of: CeO 2 , CaO, Ca(OH) 2 , MgO, Mg(OH) 2 , BaO, Ba(OH) 2 , Al 2 O 3 , ZnF, and Zn 3 (BO 3 ) 2 .
Claim 9
Dependent Claim
24 words
A separator in accordance with claim 1, wherein: said zinc reactive material is from about 3 to 40% by weight of said separator mixture.
Claim 10
Dependent Claim
14 words
A separator in accordance with claim 1, wherein: said separator comprises a wetting agent.
Claim 11
Dependent Claim
15 words
A separator in accordance with claim 9, wherein: said wetting agent is a non-polymeric constituent.
Claim 12
Dependent Claim
23 words
A separator in accordance with claim 9, wherein: said wetting agent is from about 2 to 30% by weight of said separator mixture.
Claim 13
Dependent Claim
15 words
A separator in accordance with claim 1 or 10, wherein: said separator comprises a plasticizer.
Claim 14
Dependent Claim
12 words
A separator in accordance with claim 11, wherein: said plasticizer is non-polymeric.
Claim 15
Dependent Claim
22 words
A separator in accordance with claim 12, wherein: said plasticizer is from about 1 to 50% by weight of said separator mixture.
Claim 16
Dependent Claim
15 words
A separator in accordance with claim 1, wherein: said separator comprises a further filler material.
Claim 17
Dependent Claim
16 words
A separator in accordance with claim 15, wherein: said further filler is reactive in alkaline electrolyte.
Claim 18
Dependent Claim
15 words
A separator in accordance with claim 16, wherein: said further filler is SiO 2 .
Claim 19
Dependent Claim
23 words
A separator in accordance with claim 14, wherein: said further filler is from about 5 to 25% by weight of said separator mixture.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |