US4248943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium sulfur container with chromium/chromium oxide coating
Assignee: Ford Motor Co
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Filing: 1980-04-21
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Granted: 1981-02-03
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Expires: 2000-04-21
Abstract
Abstract A coating of chromium/chromium oxide is disclosed for coating the surfaces of electrically conducting components of a sodium sulfur battery. This chromium/chromium oxide coating is placed on the surfaces of the electrically conducting components of the battery which are in contact with molten polysulfide and sulfur reactants during battery operation.
Inventors
- 👤 Frank A. Ludwig
- 👤 Lin R. Higley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:14
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/664; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M4/661; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
In a sodium sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of a metal or a metal alloy having a chromium/chromium oxide coating on surfaces in contact with molten polysulfide and sulfur reactants during battery operation, the oxygen content of said chromium/chromium oxide coating being at least 2% by weight.
Claim 2
Dependent Claim
55 words
In a sodium sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of a metal or a metal alloy having a chromium/chromium oxide coating on surfaces in contact with molten polysulfide and sulfur reactants during battery operation, the oxygen content of said chromium/chromium oxide coating being at least 2% by weight.
Claim 3
Dependent Claim
54 words
In a sodium sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of iron or an iron alloy having a chromium/chromium oxide coating on surfaces in contact with molten polysulfide and sulfur reactants during battery operation, the oxygen content of said chromium/chromium oxide coating being at least 2% by weight.
Claim 4
Dependent Claim
54 words
In a sodium sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of iron or an iron alloy having a chromium/chromium oxide coating on surfaces in contact with molten polysulfide and sulfur reactants during battery operation, the oxygen content of said chromium/chromium oxide coating being at least 2% by weight.
Claim 5
Dependent Claim
28 words
The improved sodium sulfur battery of claims 1 or 2, wherein: a layer of chromium is located between the electrically conducting component and said chromium/chromium oxide coating thereover.
Claim 6
Dependent Claim
27 words
The improved sodium sulfur battery of claims 1 or 2, wherein: said chromium/chromium oxide coating has a thickness in the range from 0.1 mils to 4 mils.
Claim 7
Dependent Claim
26 words
The improved sodium sulfur battery of claims 1 or 2, wherein: said chromium/chromium oxide coating has an oxygen content no more than about 30% by weight.
Claim 8
Dependent Claim
71 words
In a sodium sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of iron or an iron alloy having a chromium/chromium oxide coating on surfaces in contact with molten polysulfide and sulfur reactants during battery operation, said chromium/chromium oxide coating having a thickness in a range from 0.1 mils to 4.0 mils and an oxygen content in a range from 2% by weight to 30% by weight.
Claim 9
Dependent Claim
71 words
In a sodium sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of iron or an iron alloy having a chromium/chromium oxide coating on surfaces in contact with molten polysulfide and sulfur reactants during battery operation, said chromium/chromium oxide coating having a thickness in a range from 0.1 mils to 4.0 mils and an oxygen content in a range from 2% by weight to 30% by weight.
Claim 10
Dependent Claim
25 words
The improved sodium sulfur battery of claim 6, wherein: a layer of chromium is located between the electrically conducting component and said chromium/chromium oxide coating.
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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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |