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US4869980A
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Magnesium/manganese dioxide electrochemical cell
Assignee: United States Department of the Army
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Filing: 1988-11-10
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Granted: 1989-09-26
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Expires: 2008-11-10
Abstract
Abstract A magnesium/manganese dioxide electrochemical cell that has been stored fowing partial usage is improved by increasing the cathode moisture content at the time of making the cell to reduce the self discharge and increase the operating capacity after the cell has been stored following partial usage.
Inventors
- 👤 Louis P. Jarvis
- 👤 Michael T. Brundage
- 👤 Terrill B. Atwater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/46; H01M4/48; H01M4/50; H01M6/00; H01M6/04; H01M6/06; H01M6/08; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
In a magnesium/manganese dioxide electrochemical cell that has been stored following partial usage and including an alloy of magnesium as the anode, a moist cathode mix of carbon black, manganese dioxide, magnesium hydroxide, barium chromate and lithium chromate as the cathode, and 3.5 to 4.0 normal magnesium perchlorate as the electrolyte, the improvement of increasing the moisture content of the cathode mix from 34 to 38 percent at the time of making the cell to reduce the self discharge and increase the operating capacity after the cell has been stored following partial usage.
Claim 2
Dependent Claim
93 words
In a magnesium/manganese dioxide electrochemical cell that has been stored following partial usage and including an alloy of magnesium as the anode, a moist cathode mix of carbon black, manganese dioxide, magnesium hydroxide, barium chromate and lithium chromate as the cathode, and 3.5 to 4.0 normal magnesium perchlorate as the electrolyte, the improvement of increasing the moisture content of the cathode mix from 34 to 38 percent at the time of making the cell to reduce the self discharge and increase the operating capacity after the cell has been stored following partial usage.
References Cited (Backward Citations)
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US2612534A
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US2612537A
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US3025336A
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US3450569A
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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) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |