US4091193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rechargeable silver-zinc batteries
Assignee: Polymer Res Corp of America
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Filing: 1977-03-31
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Granted: 1978-05-23
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Expires: 1997-03-31
Abstract
Abstract The evolution of hydrogen in rechargeable silver-zinc batteries is reduced by the incorporation into the zinc electrode of a minor proportion of a lead oxide, e.g. either lead oxide (PbO) or lead dioxide (PbO 2 ). The invention further relates in general to electrodes for batteries, said electrodes consisting mainly of zinc oxide and having a small amount of lead oxide or lead dioxide distributed therethrough.
Inventors
- 👤 Carl Horowitz
- 👤 Michael Dichter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:00
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M10/00; H01M10/24; H01M10/32; H01M10/42; H01M10/52; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
Electrode for alkaline cells consisting essentially of zinc oxide and between about 1-4% by weight of a lead oxide selected from PbO and PbO 2 .
Claim 2
Dependent Claim
26 words
Electrode for alkaline cells consisting essentially of zinc oxide and between about 1-4% by weight of a lead oxide selected from PbO and PbO 2 .
Claim 3
Dependent Claim
18 words
Electrode according to claim 1 in which the amount of said lead oxide is between 1-3.5% by weight.
Claim 4
Dependent Claim
32 words
An alkaline cell, comprising an alkaline electrolyte, a positive electrode in contact with said electrolyte and the electrode of claim 1 as the negative electrode and being in contact with said electrolyte.
Claim 5
Dependent Claim
32 words
An alkaline cell, comprising an alkaline electrolyte, a positive electrode in contact with said electrolyte and the electrode of claim 2 as the negative electrode and being in contact with said electrolyte.
Claim 6
Dependent Claim
16 words
Alkaline cell according to claim 1 and wherein said positive electrode contains silver as active material.
Claim 7
Dependent Claim
16 words
Alkaline cell according to claim 4 and wherein said positive electrode contains silver as active material.
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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |