Patent US3769090A successfully refreshed from Google Patents.
US3769090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell
Assignee: RTX Corp
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Filing: 1971-08-18
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Granted: 1973-10-30
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Expires: 1991-08-18
Abstract
Abstract A compact electrochemical cell utilizing a circulating electrolyte in which the anode and cathode are very closely spaced, decreasing the internal resistance of the cell, is described. The cell comprises in spaced relation a reactant chamber, a gas (bubble) distributor, an electrolyte chamber, a first electrode which is flooded with electrolyte, an electrolyte chamber, a second electrode, and a second reactant chamber. The advantages of a circulating electrolyte are achieved while permitting the use of electrodes and electrode separators having low or zero bubble pressures and while maintaining the internal resistance of the cell low.
Inventors
- 👤 M Katz
- 👤 J Stedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:24
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/08; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
36 words
The fuel cell of claim 1 wherein a porous gas distributor plate is positioned behind and spaced from each of said pair of electrodes thereby forming an electrolyte chamber as defined behind each of said electrodes.
Claim 2
Dependent Claim
30 words
The fuel cell of claim 1 wherein the said electrode is a homoporous electrode comprising a uniform admixture of catalyst metal and hydrophobic polymer having a substantially zero bubble pressure.
Claim 3
Dependent Claim
31 words
The fuel cell of claim 2 wherein both of said electrodes is a homoporous electrode comprising a uniform admixture of catalyst metal and hydrophobic polymer having a substantially zero bubble pressure.
Claim 4
Dependent Claim
24 words
The fuel cell of claim 1 wherein the bubble distributor is a porous sinter having a porosity of from about 10 to 80 percent.
Claim 5
Dependent Claim
12 words
The fuel cell of claim 5 wherein the porous sinter is nickel.
Claim 6
Dependent Claim
19 words
The fuel cell of claim 1 wherein the bubble distributor is a porous plate having a plurality of orifices.
Claim 7
Dependent Claim
12 words
The fuel cell of claim 7 wherein the porous plate is metal.
Claim 8
Dependent Claim
12 words
The fuel cell of claim 7 wherein the porous plate is plastic.
Claim 9
Dependent Claim
24 words
The fuel cell of claim 2 wherein the bubble distributors are each porous sinters having a porosity of from about 10 to 80 percent.
Claim 10
Dependent Claim
19 words
The fuel cell of claim 2 wherein the bubble distributors are each porous plates having a plurality of orifices.
Claim 11
Dependent Claim
12 words
The fuel cell of claim 11 wherein the porous plate is metal.
Claim 12
Dependent Claim
12 words
The fuel cell of claim 11 wherein the porous plate is plastic.
Claim 13
Dependent Claim
143 words
The process of generating electrical energy in a fuel cell comprising a fuel electrode, an oxidant electrode, and a first non-circulating electrolyte chamber between said electrodes, said cell having in combination therewith a porous gas distributor positioned behind and spaced from at least one of said electrodes to provide a second electrolyte chamber behind said one of said electrodes, including the steps of feeding a gas to said gas distributor at the surface thereof not in contact with said electrolyte chamber under controlled conditions and feeding an electrolyte into said second electrolyte chamber, whereby said reactant gas wiLl pass thorugh said porous distributor and into said free flowing electrolyte in said second electrolyte chamber and to the face of said one electrode, said flowing electrolyte in said second electrolyte chamber continuously interchanging with electrolyte in said first electrolyte chamber through said one electrode.
Claim 14
Dependent Claim
12 words
The fuel cell of claim 7 wherein the porous plate is carbon.
Claim 15
Dependent Claim
12 words
The fuel cell of claim 11 wherein the porous plate is carbon.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |