US2730195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaning method
Assignee: Research Corp
•
Filing: 1954-10-27
•
Granted: 1956-01-10
•
Expires: 1974-10-27
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:48
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/02; B03C3/16; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF COLLECTING FUME CONTAINING SUBSTANTIAL QUANTITIES OF FLUROINE COMPOUNDS, CARBON COMPOUNDS AND TAR PRODUCTS ISSUING FROM ALUMINUM ELECTRIC FURNACES EMPLOYING PLASTIC PITCH TYPE ELECTRODES COMPRISING THE STEPS OF ENTRAINING THE FUME IN A STREAM OF CARRIER GAS, REMOVING A SUBSTANTIAL PORTION OF THE FLUORINE COMPOUNDS FROM SAID CARRIER GAS STREAM BY SUBJECTING THE GAS TO AN AQUEOUS SPRAY WHEREBY THE CARRIER GAS IS HUMIDIFIED, AND THEREAFTER SUBJECTING THE CARRIER GAS STREAM TO ELECTRICAL PRECIPITATION BETWEEN DISCHARGE ELECTRODES AND COMPLEMENTARY COLLECTING ELECTRODES CONTINUOUSLY FLUSHED WITH AN AQUEOUS MEDIUM TO REMOVE SUSPENDED PARTICLES FROM SAID GAS IN THE FORM OF AN AQUEOUS SLURRY.
Claim 2
Independent Claim
103 words
THE METHOD OF COLLECTING FUME CONTAINING SUBSTANTIAL QUANTITIES OF FLUROINE COMPOUNDS, CARBON COMPOUNDS AND TAR PRODUCTS ISSUING FROM ALUMINUM ELECTRIC FURNACES EMPLOYING PLASTIC PITCH TYPE ELECTRODES COMPRISING THE STEPS OF ENTRAINING THE FUME IN A STREAM OF CARRIER GAS, REMOVING A SUBSTANTIAL PORTION OF THE FLUORINE COMPOUNDS FROM SAID CARRIER GAS STREAM BY SUBJECTING THE GAS TO AN AQUEOUS SPRAY WHEREBY THE CARRIER GAS IS HUMIDIFIED, AND THEREAFTER SUBJECTING THE CARRIER GAS STREAM TO ELECTRICAL PRECIPITATION BETWEEN DISCHARGE ELECTRODES AND COMPLEMENTARY COLLECTING ELECTRODES CONTINUOUSLY FLUSHED WITH AN AQUEOUS MEDIUM TO REMOVE SUSPENDED PARTICLES FROM SAID GAS IN THE FORM OF AN AQUEOUS SLURRY.
References Cited (Backward Citations)
US2273194A
Cited
US2682313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |