US4056660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rechargeable cell with oxygen sensing electrode
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1977-03-18
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Granted: 1977-11-01
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Expires: 1997-03-18
Abstract
Abstract A rechargeable nickel-cadmium cell including a plurality of alternately arranged positive and negative electrodes. An oxygen sensing electrode is provided between one of the positive and one of the negative electrodes and connected to the negative terminal of the cell through an external resistor. The sensing electrode includes a suitable substrate on which cadmium is caused to be deposited, the cadmium, in the preferred form of the invention, being deposited in an amount approximately 20% of that employed in making the negative electrodes of the cell. Thereafter, the electrode is treated with silver and also, in one form of the invention, with a hydrophobic fluorocarbon polymer, such as polytetrafluoroethylene, these materials being dispersed in intimate contact with the relatively porous cadmium deposit.
Inventors
- 👤 Guy G. Rampel
- 👤 Jon R. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:12
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
69 words
A rechargeable cell comprising: a. a sealed casing; b. a positive electrode within said casing; c. a negative electrode within said casing and spaced from said positive electrode; d. an alkaline aqueous electrolyte within said casing; e. an oxygen sensing electrode within said casing; and f. separators between adjacent electrodes; g. said sensing electrode comprising a substrate having cadmium thereon, and silver dispersed in intimate contact with said cadmium.
Claim 2
Dependent Claim
69 words
A rechargeable cell comprising: a. a sealed casing; b. a positive electrode within said casing; c. a negative electrode within said casing and spaced from said positive electrode; d. an alkaline aqueous electrolyte within said casing; e. an oxygen sensing electrode within said casing; and f. separators between adjacent electrodes; g. said sensing electrode comprising a substrate having cadmium thereon, and silver dispersed in intimate contact with said cadmium.
Claim 3
Dependent Claim
38 words
The cell of claim 1, wherein a. said sensing electrode is positioned between said positive electrode and said negative electrode; and b. one of said separators separates said sensing electrode from said positive electrode and said negative electrode.
Claim 4
Dependent Claim
10 words
The cell of claim 1, wherein said substrate includes nickel.
Claim 5
Dependent Claim
15 words
The cell of claim 1, wherein said sensing electrode further includes a hydrophobic fluorocarbon polymer.
Claim 6
Dependent Claim
21 words
The cell of claim 1, wherein said cadmium is in an amount approximately 20% of that employed on the negative electrode.
Claim 7
Dependent Claim
13 words
The cell of claim 1, wherein said alkaline aqueous electrolyte is potassium hydroxide.
Claim 8
Dependent Claim
24 words
The cell of claim 1, wherein a plurality of said positive electrodes and said negative electrodes are employed in alternating arrangement in said casing.
Claim 9
Dependent Claim
12 words
The cell of claim 4, wherein said hydrophobic fluorocarbon polymer comprises polytetrafluoroethylene.
Claim 10
Dependent Claim
13 words
The cell of claim 8, wherein said polytetrafluoroethylene is dispersed within said cadmium.
Claim 11
Dependent Claim
23 words
The cell of claim 7, wherein said sensing electrode is positioned between one of said positive electrodes and one of said negative electrodes.
Claim 12
Dependent Claim
120 words
A rechargeable cell comprising: a. a sealed casing; b. a plurality of positive electrodes and a plurality of negative electrodes within said casing, said positive and negative electrodes being arranged in alternating fashion from one side of the casing to another; c. an electrolyte of aqueous potassium hydroxide within said casing; d. an oxygen sensing electrode positioned between one of said positive electrodes and one of said negative electrodes; e. separators between adjacent electrodes; f. said sensing electrode comprising a substrate having cadmium thereon, said cadmium being in an amount approximately 20% of that employed on the negative electrodes; g. said sensing electrode further having silver dispersed in intimate contact with said cadmium and having polytetrafluoroethylene dispersed within said cadmium.
Claim 13
Dependent Claim
120 words
A rechargeable cell comprising: a. a sealed casing; b. a plurality of positive electrodes and a plurality of negative electrodes within said casing, said positive and negative electrodes being arranged in alternating fashion from one side of the casing to another; c. an electrolyte of aqueous potassium hydroxide within said casing; d. an oxygen sensing electrode positioned between one of said positive electrodes and one of said negative electrodes; e. separators between adjacent electrodes; f. said sensing electrode comprising a substrate having cadmium thereon, said cadmium being in an amount approximately 20% of that employed on the negative electrodes; g. said sensing electrode further having silver dispersed in intimate contact with said cadmium and having polytetrafluoroethylene dispersed within said cadmium.
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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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |