US4343869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for metal-air batteries
Assignee: Spectrum Brands Inc
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Filing: 1981-02-09
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Granted: 1982-08-10
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Expires: 2001-02-09
Abstract
Abstract An improved metal-oxygen button cell having a thermoplastic sealing annular ring placed between the cathode assembly and the grommet is provided. The cell basically is comprised of the following components: a conductive metal can, a cathode assembly in the can, a conductive metal cover, an anode material in the cover, a separator between the cathode assembly and anode material, a grommet and a thermoplastic sealing annular ring.
Inventors
- 👤 John E. Oltman
- 👤 Robert B. Dopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:23
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/102; H01M50/109; H01M12/00; H01M12/04; H01M12/06; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
An improved metal-air button cell including a conductive metal can having a shoulder at the periphery of the bottom of the can, means for permitting introduction of oxygen into the cell, a cathode disposed within the can and a portion thereof supportedly registered against the shoulder of the can, a separator disposed above the cathode assembly, an anode disposed within the cell, a J-shaped grommet adhesively bonded to the inner surface of the can and a conductive cover sealingly inserted into the grommet, wherein the improvement comprises a thermoplastic annular ring sandwiched between the separator and the grommet.
Claim 2
Dependent Claim
98 words
An improved metal-air button cell including a conductive metal can having a shoulder at the periphery of the bottom of the can, means for permitting introduction of oxygen into the cell, a cathode disposed within the can and a portion thereof supportedly registered against the shoulder of the can, a separator disposed above the cathode assembly, an anode disposed within the cell, a J-shaped grommet adhesively bonded to the inner surface of the can and a conductive cover sealingly inserted into the grommet, wherein the improvement comprises a thermoplastic annular ring sandwiched between the separator and the grommet.
Claim 3
Dependent Claim
23 words
The cell according to claim 1 wherein the outer edge of the ring is tightly registered against the inner surface of the can.
Claim 4
Dependent Claim
16 words
The cell according to claim 1 wherein the inner surface of the ring contacts the anode.
Claim 5
Dependent Claim
16 words
The cell according to claim 1 wherein the annular ring is comprised of polyethylene or polystyrene.
Claim 6
Dependent Claim
27 words
The cell according to claim 1 wherein the cathode comprises an activating layer, a current collector and a hydrophobic layer, the components forming a laminated cathode assembly.
Claim 7
Dependent Claim
32 words
The cell according to claim 5 wherein the assembly includes zinc, the activating layer includes activated carbon and polytetrafluoroethylene, the current collector is a nickel screen and the hydrophobic layer is polytetrafluoroethylene.
References Cited (Backward Citations)
GB1178859A
Cited
GB1319780A
Cited
US3746580A
Cited
US3897265A
Cited
US4064329A
Cited
US4054726A
Cited
US4041211A
Cited
US4118544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |