US4048390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Na/s cell reactant container with metal aluminide coating
Assignee: Electric Power Research Institute
•
Filing: 1976-12-20
•
Granted: 1977-09-13
•
Expires: 1996-12-20
Abstract
Abstract Electrically conducting components of sodium/sulfur batteries subject to the corrosive attack of the cell reactants are protected by aluminiding to provide a conductive, protective coating of a metal aluminide. The protective coating finds particular application in the metal conducting container forming the sulfur compartment, where the metal aluminide reacts with the sulfur and sodium polysulfide to form a protective, doped, aluminum sulfide coating, which is conductive due to the presence of the metal from the container.
Inventors
- 👤 Debajyoti Chatterji
- 👤 Robert R. Dubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:04
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/661; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M50/00; H01M50/10; H01M50/116; H01M50/117; H01M50/119; H01M50/124; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
In a sodium-sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of a metal or an alloy having a major amount of a metal selected from the group consisting of iron, cobalt and nickel, having an aluminide coating on surfaces in contact with sulfur.
Claim 2
Dependent Claim
48 words
In a sodium-sulfur battery the improvement which comprises: electrically conducting components of said battery comprised of a metal or an alloy having a major amount of a metal selected from the group consisting of iron, cobalt and nickel, having an aluminide coating on surfaces in contact with sulfur.
References Cited (Backward Citations)
US3644145A
Cited
US3982957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |