US3907591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive sulphur electrode for galvanic cells and method of producing the same
Assignee: VARTA AG
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Filing: 1974-10-22
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Granted: 1975-09-23
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Expires: 1994-10-22
Abstract
Abstract Positive sulphur electrode is formed of amorphous, insoluble sulphur with an additive of conductive material, and is produced by a method which includes heating crystalline sulphur quenching it and extracting it with a solvent so as to transform it into pulverulent amorphous, insoluble form, admixing a conductive material with the pulverulent insoluble sulphur, and applying the mixture at high pressure to a support.
Inventors
- 👤 Helmut Lauck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M6/00; H01M6/14; H01M6/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
A GALVANIC CELL HAVING A NEGATIVE ELECTRODE FORMED OF LIGHT METAL AND AN ELECTROLYTE CONTAINING A CONDUCTIVE SALT IN AN ORGANIC SOLVENT, A POSITIVE SULPHUR ELECTRODE FORMED OF AMORPHOUS, INSOLUBLE SULPHUR HAVING AN ADDITIVE OF CONDUCTIVE MATERIA.
Claim 2
Dependent Claim
37 words
A GALVANIC CELL HAVING A NEGATIVE ELECTRODE FORMED OF LIGHT METAL AND AN ELECTROLYTE CONTAINING A CONDUCTIVE SALT IN AN ORGANIC SOLVENT, A POSITIVE SULPHUR ELECTRODE FORMED OF AMORPHOUS, INSOLUBLE SULPHUR HAVING AN ADDITIVE OF CONDUCTIVE MATERIA.
Claim 3
Dependent Claim
15 words
Galvanic cell according to claim 1, wherein a stabilizer is dissolved in the organic solvent.
Claim 4
Dependent Claim
23 words
Galvanic cell according to claim 1, wherein a salt which increases the electrical conductivity of the electrolyte is dissolved in the organic solvent.
Claim 5
Dependent Claim
26 words
Galvanic cell according to claim 1, wherein a stabilizer and a salt which increases the electrical conductivity of the electrolyte are dissolved in the organic solvent.
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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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |