US4190704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protected calcium anode
Assignee: United States Department of the Navy
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Filing: 1979-02-05
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Granted: 1980-02-26
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Expires: 1999-02-05
Abstract
Abstract A calcium electrode for an electrochemical cell with an electrolyte consing of molten nitrates and up to 10 mole percent halides.
Inventors
- 👤 Melvin H. Miles
- 👤 Aaron N. Fletcher
- 👤 Dwight A. Fine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:35
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M6/00; H01M6/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
48 words
An electrochemical cell, comprising: an electrolyte consisting of molten nitrate; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and a controllable passivating layer of CaO on said anode for restricting the corrosive reaction of said molten nitrate electrolyte with said anode.
Claim 2
Dependent Claim
48 words
An electrochemical cell, comprising: an electrolyte consisting of molten nitrate; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and a controllable passivating layer of CaO on said anode for restricting the corrosive reaction of said molten nitrate electrolyte with said anode.
Claim 3
Dependent Claim
14 words
An electrochemical cell according to claim 1 wherein said electrolyte is LiNO 3 .
Claim 4
Dependent Claim
14 words
An electrochemical cell according to claim 1 wherein said electrolyte is KNO 3 .
Claim 5
Dependent Claim
25 words
An electrochemical cell according to claim 1 wherein said electrolyte is about 60 mole percent KNO 3 and about 40 mole percent LiNO 3 .
Claim 6
Dependent Claim
54 words
An electrochemical cell comprising: an electrolyte consisting of molten nitrate containing about 5 mole % halide; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and an controllable passivating layer of CaO on said anode for restricting the corrosive reaction of said molten nitrate electrolyte with said anode.
Claim 7
Dependent Claim
54 words
An electrochemical cell comprising: an electrolyte consisting of molten nitrate containing about 5 mole % halide; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and an controllable passivating layer of CaO on said anode for restricting the corrosive reaction of said molten nitrate electrolyte with said anode.
Claim 8
Dependent Claim
15 words
An electrochemical cell according to claim 5 wherein said molten nitrate is KNO 3 .
Claim 9
Dependent Claim
14 words
An electrochemical cell according to claim 5 wherein said nitrate is LiNO 3 .
Claim 10
Dependent Claim
55 words
An electrochemical cell, comprising: an electrolyte consisting of molten LiNO 3 and up to 10 mole percent LiCl; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and a controllable passivating layer of CaO on said anode for restricting the corrosive reaction of said molten nitrate with said anode.
Claim 11
Dependent Claim
55 words
An electrochemical cell, comprising: an electrolyte consisting of molten LiNO 3 and up to 10 mole percent LiCl; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and a controllable passivating layer of CaO on said anode for restricting the corrosive reaction of said molten nitrate with said anode.
Claim 12
Dependent Claim
66 words
An electrochemical cell, comprising: an electrolyte consisting of about 54 mole percent molten KNO 3 , about 36 mole percent molten LiNO 3 and about 10 mole percent LiCL; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and a controllable passivating layer of CAO on said anode for restricting the corrosive reaction of said molten nitrate with said anode.
Claim 13
Dependent Claim
66 words
An electrochemical cell, comprising: an electrolyte consisting of about 54 mole percent molten KNO 3 , about 36 mole percent molten LiNO 3 and about 10 mole percent LiCL; a cathode immersed in said electrolyte; an anode consisting of calcium immersed in said electrolyte; and a controllable passivating layer of CAO on said anode for restricting the corrosive reaction of said molten nitrate with said anode.
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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |