US4461814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell
Assignee: Yardney Technical Products Inc
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Filing: 1982-02-08
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Granted: 1984-07-24
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Expires: 2002-02-08
Abstract
Abstract A primary electrochemical cell having an oxidizable active anode material, a cathode current colletor including a layer of a catalyst material for reducing the liquid cathode material, and an electrolytic solution comprising a liquid cathode material and an electrolyte solute dissolved therein. The catalyst material comprises a carbon black having a surface area of 250 square meters per gram or greater and a dibutyl phthalate absorption number of 125 cubic centimeters per 100 grams of carbon black or greater.
Inventors
- 👤 Keith A. Klinedinst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:27
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; H01M4/02; H01M4/64; H01M4/66; H01M4/663; H01M6/00; H01M6/14; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
A primary electrochemical cell comprising an oxidizable active anode material; a cathode current collector including a catalyst for reducing the liquid cathode material comprising carbon black characterized by a surface area of 250 square meters per gram or greater and a dibutyl phthalate absorption number of 125 cubic centimeters per 100 grams of carbon black or greater bonded to an inert electrically-conductive substrate; and an electrolytic solution, in contact with the anode material and cathode current collector, comprising a reducible liquid cathode material and an electrolyte solute dissolved therein.
Claim 2
Dependent Claim
89 words
A primary electrochemical cell comprising an oxidizable active anode material; a cathode current collector including a catalyst for reducing the liquid cathode material comprising carbon black characterized by a surface area of 250 square meters per gram or greater and a dibutyl phthalate absorption number of 125 cubic centimeters per 100 grams of carbon black or greater bonded to an inert electrically-conductive substrate; and an electrolytic solution, in contact with the anode material and cathode current collector, comprising a reducible liquid cathode material and an electrolyte solute dissolved therein.
Claim 3
Dependent Claim
22 words
A primary electrochemical cell in accordance with claim 1 wherein the catalyst comprises a mixture of carbon black and a thermoplastic polymer.
Claim 4
Dependent Claim
25 words
A primary electrochemical cell in accordance with claim 2 wherein the catalyst contains about 90% carbon black by weight and about 10% polytetrafluoroethylene by weight.
Claim 5
Dependent Claim
27 words
A primary electrochemical cell in accordance with claim 3 wherein the oxidizable anode material comprises lithium metal; and the reducible liquid cathode material is a fluid oxyhalide.
Claim 6
Dependent Claim
18 words
A primary electrochemical cell in accordance with claim 4 wherein the reducible liquid cathode material is thionyl chloride.
Claim 7
Dependent Claim
45 words
A primary electrochemical cell in accordance with claim 1 wherein the carbon black is characterized by a surface area of 1000 square meters per gram or greater and a dibutyl phthalate absorption number of 230 cubic centimeters per 100 grams of carbon black or greater.
Claim 8
Dependent Claim
22 words
A primary electrochemical cell in accordance with claim 6 wherein the catalyst comprises a mixture of carbon black and a thermoplastic polymer.
Claim 9
Dependent Claim
25 words
A primary electrochemical cell in accordance with claim 7 wherein the catalyst contains about 90% carbon black by weight and about 10% polytetrafluoroethylene by weight.
Claim 10
Dependent Claim
26 words
A primary electrochemical cell in accordance with claim 8 wherein the oxidizable anode material comprises lithium metal; and the reducible liquid cathode material is thionyl chloride.
References Cited (Backward Citations)
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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) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |