US4148974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable electrolyte for reserve electrochemical cells
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1976-12-09
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Granted: 1979-04-10
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Expires: 1996-12-09
Abstract
Abstract The use of lithium hexafluroarsenate dissolved in acetronitrile as an electrolyte in a reserve electrochemical cell having a lithium anode, a sulfur dioxide depolarizer and a means for maintaining the electrolyte and depolarizer remote from the anode prior to activation.
Inventors
- 👤 William J. Eppley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:33
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/36; H01M6/38; H01M6/14; H01M6/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
An electrochemical cell device, comprising: a lithium anode; a cell completing mixture remote from said anode, comprising acetonitrile, lithium hexafluroarsenate and sulfur dioxide; and reserve means for admixing said anode and said cell completing mixture to form an electrochemical cell.
Claim 2
Dependent Claim
40 words
An electrochemical cell device, comprising: a lithium anode; a cell completing mixture remote from said anode, comprising acetonitrile, lithium hexafluroarsenate and sulfur dioxide; and reserve means for admixing said anode and said cell completing mixture to form an electrochemical cell.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein said reserve means includes means for transferring said mixture to said anode upon command.
Claim 4
Dependent Claim
66 words
An electrochemical cell device, comprising: a first chamber containing a lithium anode, and space for an electrolyte and depolarizer; a second chamber remote from said first chamber and containing an electrolyte comprising acetonitrile and lithium hexafluroarsenate, and a quantity of sulfur dioxide as a depolarizer; and means for transferring said electrolyte and said depolarizer from said second chamber to said first chamber to activate said cell.
Claim 5
Dependent Claim
66 words
An electrochemical cell device, comprising: a first chamber containing a lithium anode, and space for an electrolyte and depolarizer; a second chamber remote from said first chamber and containing an electrolyte comprising acetonitrile and lithium hexafluroarsenate, and a quantity of sulfur dioxide as a depolarizer; and means for transferring said electrolyte and said depolarizer from said second chamber to said first chamber to activate said cell.
Claim 6
Dependent Claim
26 words
The device of claim 3 wherein said first chamber contains a plurality of lithium anodes and cathode collectors connected in series to form a multicell battery.
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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |