US3836397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron electrode for alkaline cells
Assignee: Westinghouse Electric Corp
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Filing: 1972-07-31
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Granted: 1974-09-17
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Expires: 1992-07-31
Abstract
Abstract A battery is made containing at least one positive and one negative electrode plate with electrolyte contacting the plates, the negative electrode plate containing an active material comprising about 60-80 weight percent iron particles over about 5 microns diameter and about 20-40 weight percent iron particles up to about 2 microns diameter, the iron particles having a fused coating of sulfur, selenium or tellurium.
Inventors
- 👤 C Hardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:18
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; H01M4/74; H01M4/747; H01M4/24; H01M4/248; H01M4/36; H01M4/48; H01M4/52; H01M4/62; H01M4/624; H01M4/626; H01M4/80; H01M4/806; H01M4/66; H01M4/661; H01M50/00; H01M50/40; H01M50/46; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
The plate of claim 1 wherein the iron oxide particles are selected from the group consisting of FeO, Fe2O3, Fe3O4, Fe2O3.H2O and mixtures thereof.
Claim 2
Dependent Claim
11 words
The plate of claim 1 wherein the additive is elemental sulfur.
Claim 3
Dependent Claim
36 words
The plate of claim 1 wherein the meTal fiber in the electrode plaque is selected from the group consisting of nickel, nickel plated iron and nickel plated steel and the plaque is about 75-95 percent porous.
Claim 4
Dependent Claim
39 words
The plate of claim 1 wherein the negative electrode plate comprises a diffusion bonded metal fiber plaque containing active material, said plate being contained in a battery having at least one positive plate with alkali electrolyte contacting the plates.
References Cited (Backward Citations)
US1761740A
Cited
US3181960A
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US3189668A
Cited
US3507696A
Cited
US3527613A
Cited
US3650835A
Cited
US3679482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |