US2695216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating a nitrogen fixation furnace
Assignee: FMC Corp
•
Filing: 1950-04-29
•
Granted: 1954-11-23
•
Expires: 1970-04-29
Abstract
No abstract record available.
Inventors
- 👤 Albert C Peck
- 👤 Wendell S Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:07
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/30; C01B21/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF OPERATING A NITROGEN FIXATION FURNACE TO OBTAIN A HIGH YIELD OF NITROGEN OXIDES, WHICH COMPRISES FORCING A MIXTURE OF NITROGEN AND OXYGEN THROUGH THE COMBUSTION ZONE OF THE FURNACE; PRE-HEATING SAID MIXTURE PRIOR TO ENTRANCE INTO THE COMBUSTION ZONE TO A TEMPERATURE ABOVE THE AUTO-IGNITION POINT OF THE FUEL EMPLOYED; INJECTING A GASEOUS FUEL INTO THE PRE-HEATED MIXTURE, AS IT PASSES THROUGH THE COMBUSTION ZONE, WITH
Claim 2
Independent Claim
69 words
A METHOD OF OPERATING A NITROGEN FIXATION FURNACE TO OBTAIN A HIGH YIELD OF NITROGEN OXIDES, WHICH COMPRISES FORCING A MIXTURE OF NITROGEN AND OXYGEN THROUGH THE COMBUSTION ZONE OF THE FURNACE; PRE-HEATING SAID MIXTURE PRIOR TO ENTRANCE INTO THE COMBUSTION ZONE TO A TEMPERATURE ABOVE THE AUTO-IGNITION POINT OF THE FUEL EMPLOYED; INJECTING A GASEOUS FUEL INTO THE PRE-HEATED MIXTURE, AS IT PASSES THROUGH THE COMBUSTION ZONE, WITH
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |