US3257777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating waste gases
Assignee: Demag Elektrometallurgie GmbH
•
Filing: 1962-01-25
•
Granted: 1966-06-28
•
Expires: 1982-01-25
Abstract
No abstract record available.
Inventors
- 👤 Weisse Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:18
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; C21C5/40; C22; C22B; C22B7/00; C22B7/02; F; F27; F27D; F27D17/00; F27D17/20; F27D17/22; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A METHOD OF SEPARATING GASEOUS AND VAPOROUS CONTAMINANTS FROM WASTE GASES RISING FROM A METALLIC MELT WHICH HAS BEEN TREATED WITH CHLORINE IN A FURNACE HAVING A WASTE GAS DISCHARGE LINE, WHICH COMPRISES INTRODUCING INTO SAID WASTE GAS DISCHARGE LINE A RAPIDLY FLOWING STREAM OF DRY PRESSURIZED EXTRANEOUS CARRIER GAS TO SUCK WASTE GAS FROM SAID FURNANCE INTO SAID DISCHARGE LINE THEREBY TO SPEED UP THE FLOW OF WASTE GAS THROUGH SAID DISCHARGE LINE AND TO OBTAIN MIXTURE OF CARRIER GAS AND WASTE GAS, PASSING THE MIXTURE THEREAFTER THROUGH A CONFINED COOLING ZONE TO CAUSE PRECIPITATION OF SAID GASEOUS AND VAPOROUS CONTAMINANTS IN SAID WASTE GAS INTO SOLID PARTICLES, MAINTAINING THE PRECIPITATED SOLID PARTICLES IN SUSPENSION IN SAID GAS MIXTURE AND CONVEYING THE GAS MIXTURE WITH THE PRECIPITATED PARTICLES SUSPENDED THEREIN TO A FILTER STATION FOR REMOVAL OF SAID PARTICLES.
Claim 2
Independent Claim
140 words
A METHOD OF SEPARATING GASEOUS AND VAPOROUS CONTAMINANTS FROM WASTE GASES RISING FROM A METALLIC MELT WHICH HAS BEEN TREATED WITH CHLORINE IN A FURNACE HAVING A WASTE GAS DISCHARGE LINE, WHICH COMPRISES INTRODUCING INTO SAID WASTE GAS DISCHARGE LINE A RAPIDLY FLOWING STREAM OF DRY PRESSURIZED EXTRANEOUS CARRIER GAS TO SUCK WASTE GAS FROM SAID FURNANCE INTO SAID DISCHARGE LINE THEREBY TO SPEED UP THE FLOW OF WASTE GAS THROUGH SAID DISCHARGE LINE AND TO OBTAIN MIXTURE OF CARRIER GAS AND WASTE GAS, PASSING THE MIXTURE THEREAFTER THROUGH A CONFINED COOLING ZONE TO CAUSE PRECIPITATION OF SAID GASEOUS AND VAPOROUS CONTAMINANTS IN SAID WASTE GAS INTO SOLID PARTICLES, MAINTAINING THE PRECIPITATED SOLID PARTICLES IN SUSPENSION IN SAID GAS MIXTURE AND CONVEYING THE GAS MIXTURE WITH THE PRECIPITATED PARTICLES SUSPENDED THEREIN TO A FILTER STATION FOR REMOVAL OF SAID PARTICLES.
References Cited (Backward Citations)
US1898637A
Cited
US2580635A
Cited
US2533021A
Cited
US2675891A
Cited
US2811435A
Cited
US2940541A
Cited
US3009687A
Cited
US2870869A
Cited
US3084039A
Cited
US3063686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |