Patent US2808547A successfully refreshed from Google Patents.
US3779699A
Expired / Lapsed
US
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Furnace structure
Assignee: Alcoa Corp
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Filing: 1973-03-15
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Granted: 1973-12-18
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Expires: 1993-03-15
Abstract
Abstract Furnace having a chamber for holding molten salt, such as alkali metal chloride and alkaline earth metal chloride, in which contact of the molten salts with a perimetric shell around that chamber is prevented by a glass barrier between that shell and the aforesaid chamber.
Inventors
- 👤 A Russell
- 👤 L Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:21
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/085; C22; C22B; C22B26/00; C22B9/00; C22B9/10; Y; Y10; Y10S; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A furnace comprising a chamber containing at least one molten salt from the group consisting of alkali metal chlorides and alkaline earth metal chlorides, a wall of said chamber being in contact with the molten salt and being permeable thereby, a shell around the said chamber and spaced from the said wall, and a glass barrier intermediate the said wall and the said shell, whereby contact of molten salt with the said shell is inhibited by the said glass barrier.
Claim 2
Dependent Claim
80 words
A furnace comprising a chamber containing at least one molten salt from the group consisting of alkali metal chlorides and alkaline earth metal chlorides, a wall of said chamber being in contact with the molten salt and being permeable thereby, a shell around the said chamber and spaced from the said wall, and a glass barrier intermediate the said wall and the said shell, whereby contact of molten salt with the said shell is inhibited by the said glass barrier.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |