US3650835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of battery plates with iron oxides having a fused coating
Assignee: Westinghouse Electric Corp
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Filing: 1969-12-16
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Granted: 1972-03-21
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Expires: 1989-12-16
Abstract
Abstract A method of producing active electrode material consists of fusing an elemental sulfur, selenium, or tellurium additive coating onto iron oxide and/or hydrated iron oxide, within a temperature range dependent on the melting point of the additive.
Inventors
- 👤 John F Jackovitz
- 👤 Alois Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/52; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
The method of claim 1 wherein the iron particle component is selected from the group consisting of FeO, Fe2O3, Fe3O4, Fe2O3.H2O and mixtures thereof.
Claim 2
Dependent Claim
21 words
The method of claim 1 wherein the iron component has an average particle size range between about 37 and 74 microns.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the additive is about 99 percent pure.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the container has a polytetrafluoroethylene lining.
Claim 5
Independent Claim
112 words
A method of making battery plates comprising the steps of: a. mixing an iron particle component selected from the group consisting of iron oxide particles, iron oxide hydrate particles and mixtures thereof with elemental sulfur, the sulfur being added in the range of about 5 to 20 percent of the weight of the iron particle component, b. heating the mixture, in a container that allows gas leakage, at a temperature between about 100* and 150* C. to provide a physically fused, non chemically reacted coating of sulfur on the iron component particles so as to substantially cover their surface. and applying a slurry of the coated iron oxide particles to a plaque.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |