Patent US4272593A successfully refreshed from Google Patents.
US4272593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell with improved cathode current collector
Assignee: Yardney Technical Products Inc
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Filing: 1980-04-25
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Granted: 1981-06-09
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Expires: 2000-04-25
Abstract
Abstract A primary electrochemical cell having an oxidizable active anode material, a cathode current collector including a catalytic layer for reducing the liquid cathode material, and an electrolytic solution comprising a liquid cathode material and an electrolyte solute dissolved therein. The catalyst layer is a composite material of carbon black particles with platinum particles supported thereon.
Inventors
- 👤 Keith A. Klinedinst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:34
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/02; H01M4/64; H01M4/66; H01M4/661; H01M4/663; H01M4/668; H01M6/00; H01M6/14; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
63 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 a composite material of carbon and platinum 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
63 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 a composite material of carbon and platinum 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
23 words
A primary electrochemical cell in accordance with claim 1 wherein the composite material of carbon and platinum comprises platinum supported on carbon particles.
Claim 4
Dependent Claim
32 words
A primary electrochemical cell in accordance with claim 2 wherein the composite material of carbon and platinum comprises a layer of an aggregate of carbon black particles with platinum particles supported thereon.
Claim 5
Dependent Claim
25 words
A primary electrochemical cell in accordance with claim 3 wherein the composite material of carbon and platinum contains from 5 to 30% platinum by weight.
Claim 6
Dependent Claim
22 words
A primary electrochemical cell in accordance with claim 3 wherein the composite material of carbon and platinum also contains a thermoplastic polymer.
Claim 7
Dependent Claim
15 words
A primary electrochemical cell in accordance with claim 5 wherein the thermoplastic polymer is polytetrafluoroethylene.
Claim 8
Dependent Claim
19 words
A primary electrochemical cell in accordance with claim 6 wherein the composite material contains about 10% polytetrafluoroethylene by weight.
Claim 9
Dependent Claim
32 words
A primary electrochemical cell in accordance with claim 3 wherein the catalyst layer is bonded to the inert, electrically-conductive substrate by a porous intermediate bonding layer comprising a thermoplastic polymer and carbon.
Claim 10
Dependent Claim
24 words
A primary electrochemical cell in accordance with claim 8 wherein the inert, electrically-conductive substrate of the cathode current collector is a thin metal foil.
Claim 11
Dependent Claim
26 words
A primary electrochemical cell in accordance with claim 9 wherein the oxidizable anode material comprises lithium metal; and the reducible liquid cathode material comprises thionyl chloride.
Claim 12
Dependent Claim
23 words
A primary electrochemical cell in accordance with claim 10 wherein the composite material of carbon and platinum contains about 10% platinum by weight.
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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) | 1984-06-08 | 1984-12-08 | 1985-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-08 | 1988-12-08 | 1989-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-08 | 1992-12-08 | 1993-06-09 | $7700.00 | Window Closed / Lapsed |