Patent US2673141A successfully refreshed from Google Patents.
US2673141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for rendering nitrous gases innocuous
Assignee: BASF Schweiz AG
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Filing: 1950-04-14
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Granted: 1954-03-23
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Expires: 1970-04-14
Abstract
No abstract record available.
Inventors
- 👤 Barman Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:00
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/54; B01D53/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A PROCESS FOR THE DISPOSAL OF GASES CONTAINING NITROGEN OXIDES ORIGINATING FROM NITRATION REACTIONS AND THE LIKE, THE OXIDES TO BE DISPOSED OF WITHIN A VERY SHORT TIME IN CONSIDERABLE AMOUNT IN ORDER TO PRODUCE A GAS MIXTURE WHICH IS SUBSTANTIALLY FREE FROM NITROGEN OXIDES AND CAN BE DISCHARGED SAFELY WITHOUT DETRIMETAL EFFECT ON THE ENVIRONMENT, SAID PROCES COMPRISING FORMING A FLAME BY THE COMBUSTION OF A CARBON CONTAINING FUEL WITH AIR, FEEDING THE GASES CONTAINING NITROGEN OXIDES INTO SAID FLAME, THE AMOUNT OF FUEL AND AIR BEING SUFFICIENT TO PRODUCE MORE THAN 2000 KILOGRAM CALORIES PER KILOGRAM OF NITROGEN OXIDE, CALCULATED AS NO2, AND THE RELATIVE PROPORTION OF AIR AND FUEL BEING SO CHOSEN THAT NO EXCESS OF ATMOSPHERIC OXYGEN OVER THE AMOUNT OF FUEL TO BE BURNT IS PRESENT, AND REMOVING THE GAS MIXTURE PRODUCED BY THE SAID FLAME FROM THE ZONE OF THE FLAME AND DISCHARGING IT TO THE ATMOSPHERE SUBSTANTIALLY FREE FROM NITROGEN OXIDES.
Claim 2
Dependent Claim
158 words
A PROCESS FOR THE DISPOSAL OF GASES CONTAINING NITROGEN OXIDES ORIGINATING FROM NITRATION REACTIONS AND THE LIKE, THE OXIDES TO BE DISPOSED OF WITHIN A VERY SHORT TIME IN CONSIDERABLE AMOUNT IN ORDER TO PRODUCE A GAS MIXTURE WHICH IS SUBSTANTIALLY FREE FROM NITROGEN OXIDES AND CAN BE DISCHARGED SAFELY WITHOUT DETRIMETAL EFFECT ON THE ENVIRONMENT, SAID PROCES COMPRISING FORMING A FLAME BY THE COMBUSTION OF A CARBON CONTAINING FUEL WITH AIR, FEEDING THE GASES CONTAINING NITROGEN OXIDES INTO SAID FLAME, THE AMOUNT OF FUEL AND AIR BEING SUFFICIENT TO PRODUCE MORE THAN 2000 KILOGRAM CALORIES PER KILOGRAM OF NITROGEN OXIDE, CALCULATED AS NO2, AND THE RELATIVE PROPORTION OF AIR AND FUEL BEING SO CHOSEN THAT NO EXCESS OF ATMOSPHERIC OXYGEN OVER THE AMOUNT OF FUEL TO BE BURNT IS PRESENT, AND REMOVING THE GAS MIXTURE PRODUCED BY THE SAID FLAME FROM THE ZONE OF THE FLAME AND DISCHARGING IT TO THE ATMOSPHERE SUBSTANTIALLY FREE FROM NITROGEN OXIDES.
References Cited (Backward Citations)
US1487647A
Cited
US2381696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |