Patent US5002843A successfully refreshed from Google Patents.
US5002843A
Expired / Lapsed
US
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Separator material for electrochemical cells
Assignee: Individual
•
Filing: 1989-06-12
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Granted: 1991-03-26
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Expires: 2009-06-12
Abstract
Abstract An electrochemical cell characterized as utilizing an aramid fiber as a separator material. The aramid fibers are especially suited for lithium/thionyl chloride battery systems. The battery separator made of aramid fibers possesses superior mechanical strength, chemical resistance, and is flame retardant.
Inventors
- 👤 Wendy R. Cieslak
- 👤 Leonard J. Storz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:57
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/423; H01M50/44; H01M2300/00; H01M2300/0017; H01M2300/002
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
A lithium/thionyl chloride battery comprising an aramid fiber mat separator.
Claim 2
Dependent Claim
10 words
A lithium/thionyl chloride battery comprising an aramid fiber mat separator.
Claim 3
Dependent Claim
12 words
The battery of claim 1, wherein said aramid fiber is poly(p-phenylene terephthalamide).
Claim 4
Dependent Claim
12 words
The battery of claim 1, wherein said aramid fiber is poly(m-phenylene isophthalamide).
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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) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |