Patent US1398482A successfully refreshed from Google Patents.
Patent US2947673A successfully refreshed from Google Patents.
US2947673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collection of gas from furnace for electrolytic smelting production of aluminium
Assignee: Elektrokemisk AS
•
Filing: 1958-03-26
•
Granted: 1960-08-02
•
Expires: 1978-03-26
Abstract
No abstract record available.
Inventors
- 👤 Sem Mathias Ovrom
- 👤 Collin Fredrik Christen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:59
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN THE MANUFACTURE OF ALUMINUM BY MELT ELECTROLYSIS OF A SOLUTION OF ALUMINIUM OXIDES IN MOLTEN FLUORIDES WHEREIN A FURNACE GAS INCLUDING CARBON MONOXIDE, CARBON DIOXIDE, DUST AND TAR FUMES IS GENERATED THE METHOD COMPRISING THE STEPS OF COLLECTING THE GAS IN THE FURNACE, WITHDRAWING THE COLLECTED GAS FROM THE FURNACE, THEN AT A POINT IMMEDIATELY ADJACENT SUCH FURNACE AND, WHILE THE GAS TEMPERATURE IS NOT LESS THAN 200*C. SUBJECTING THE GAS TO SUDDEN COOLING AND AGITATION BY INJECTING A SPRAY OF LIQUID INTO THE GAS STREAM TO CONDENSE TAR FUMES AND TO CREATE TURBULENCE WHEREBY TAR FUMES AND DUST PARTICLES ARE CAUSED TO AGGLOMERATE AND SEPARATING THE AGGLOMERATES FROM THE GAS AND CONDUCTING THE GAS AWAY FROM THE FURNACE POT.
Claim 2
Dependent Claim
121 words
IN THE MANUFACTURE OF ALUMINUM BY MELT ELECTROLYSIS OF A SOLUTION OF ALUMINIUM OXIDES IN MOLTEN FLUORIDES WHEREIN A FURNACE GAS INCLUDING CARBON MONOXIDE, CARBON DIOXIDE, DUST AND TAR FUMES IS GENERATED THE METHOD COMPRISING THE STEPS OF COLLECTING THE GAS IN THE FURNACE, WITHDRAWING THE COLLECTED GAS FROM THE FURNACE, THEN AT A POINT IMMEDIATELY ADJACENT SUCH FURNACE AND, WHILE THE GAS TEMPERATURE IS NOT LESS THAN 200*C. SUBJECTING THE GAS TO SUDDEN COOLING AND AGITATION BY INJECTING A SPRAY OF LIQUID INTO THE GAS STREAM TO CONDENSE TAR FUMES AND TO CREATE TURBULENCE WHEREBY TAR FUMES AND DUST PARTICLES ARE CAUSED TO AGGLOMERATE AND SEPARATING THE AGGLOMERATES FROM THE GAS AND CONDUCTING THE GAS AWAY FROM THE FURNACE POT.
References Cited (Backward Citations)
US2731407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |