Patent US4401732A successfully refreshed from Google Patents.
US4401732A
Expired / Lapsed
US
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Fluid cathode depolarized cell
Assignee: Duracell Inc USA
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Filing: 1982-01-26
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Granted: 1983-08-30
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Expires: 2002-01-26
Abstract
Abstract A small diameter (<1'' (2.54 cm)) fluid depolarized cell having enhanced electrochemical capability and being both economical and adaptable to high rate manufacturing procedures. The cell is made with a cathode slurry of the fluid depolarizer and controlled amounts of an activated carbonaceous material.
Inventors
- 👤 Noble E. Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:05
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
A small diameter cylindrical electrochemical cell having an anode comprised of an alkali or alkaline metal, a fluid cathode depolarizer/electrolyte solvent with electrolyte salt dissolved therein and an inert cathode made of a carbonaceous powder all contained within a cell container characterized in that the inner diameter of said cell container is less that about one inch (2.5 cm) and said fluid cathode depolarizer and said carbonaceous material are in admixture as a slurry within said cell wherein said carbonaceous powder comprises from 1.7 to 7.8% by volume of said slurry.
Claim 2
Dependent Claim
91 words
A small diameter cylindrical electrochemical cell having an anode comprised of an alkali or alkaline metal, a fluid cathode depolarizer/electrolyte solvent with electrolyte salt dissolved therein and an inert cathode made of a carbonaceous powder all contained within a cell container characterized in that the inner diameter of said cell container is less that about one inch (2.5 cm) and said fluid cathode depolarizer and said carbonaceous material are in admixture as a slurry within said cell wherein said carbonaceous powder comprises from 1.7 to 7.8% by volume of said slurry.
Claim 3
Dependent Claim
15 words
The cell of claim 1 wherein said carbonaceous powder is comprised of Shawinigan acetylene black.
Claim 4
Dependent Claim
26 words
The cell of claim 1 wherein said fluid cathode depolarizer is selected from the group consisting of fluid oxyhalides, non-metallic oxides, non-metallic halides and mixtures thereof.
Claim 5
Dependent Claim
15 words
The cell of claim 3 wherein said fluid cathode depolarizer is comprised of thionyl chloride.
Claim 6
Dependent Claim
15 words
The cell of claim 3 wherein said fluid cathode depolarizer is comprised of sulfur dioxide.
Claim 7
Dependent Claim
14 words
The cell of claim 1,4 or 5 wherein said anode is comprised of lithium.
Claim 8
Dependent Claim
17 words
The cell of claim 1 wherein said inner diameter is less than about 0.5 inches (1.2 cm).
Claim 9
Dependent Claim
19 words
The cell of claim 1 wherein said carbonaceous powder comprises between 3.5 to 4.4% by volume of said slurry.
Claim 10
Dependent Claim
12 words
The cell of claim 1 wherein said slurry further contains a binder.
Claim 11
Dependent Claim
12 words
The cell of claim 9 wherein said binder is comprised of polytetrafluoroethylene.
Claim 12
Dependent Claim
34 words
A small diameter cylindrical cell having a lithium anode, a slurry of thionyl chloride cathode depolarizer and a cathode comprised of a carbonaceous powder comprising from 3.5 to 4.4% by volume of said slurry.
Claim 13
Dependent Claim
34 words
A small diameter cylindrical cell having a lithium anode, a slurry of thionyl chloride cathode depolarizer and a cathode comprised of a carbonaceous powder comprising from 3.5 to 4.4% by volume of said slurry.
Claim 14
Dependent Claim
37 words
The cell of claim 11 wherein said lithium anode comprises a foil which lines the inner surface of said container, and wherein said slurry is positioned within said foil lining and is spaced therefrom by separating means.
Claim 15
Dependent Claim
15 words
The cell of claim 11 wherein said carbonaceous powder is comprised of Shawinigan acetylene black.
Claim 16
Dependent Claim
18 words
The cell of claims 11, 12 or 13 wherein said slurry further contains a binder comprised of polytetrafluoroethylene.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |