US2548002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal fixation of atmospheric nitrogen
Assignee: Wisconsin Alumni Research Foundation
•
Filing: 1944-06-06
•
Granted: 1951-04-10
•
Expires: 1964-06-06
Abstract
No abstract record available.
Inventors
- 👤 Daniels Farrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:40
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/20; C01B21/24; C01B21/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A PROCESS FOR THE THERMAL FIXATION OF NITROGEN AS NITRIC OXIDE, THE STEPS WHICH COMPRISE: PASSING A GAS CONTAINING NITROGEN AND OXYGEN IN ALTERNATE UPWARD AND DOWNWARD RUNS THROUGH SUCCESSIVE BEDS OF REFRACTORY BODIES IN A SHAFT FURNACE, SAID BEDS COMPRISING AN INTERMEDIATE BED OF RELATIVELY LARGE BODIES AND UPPER AND LOWER ADJACENT BEDS OF RELATIVELY SMALLER BODIES, AND HEATING SAID INTERMEDIATE BED TO A HIGH TEMPERATURE SUFFICIENT TO INDUCE THE OXIDATION OF NITROGEN BY INJECTION OF A FLUID COMBUSTIBLE ADJACENT THE JUNCTION OF SAID INTERMEDIATE BED AND THAT BED OF RELATIVELY SMALLER BODIES
Claim 2
Dependent Claim
95 words
IN A PROCESS FOR THE THERMAL FIXATION OF NITROGEN AS NITRIC OXIDE, THE STEPS WHICH COMPRISE: PASSING A GAS CONTAINING NITROGEN AND OXYGEN IN ALTERNATE UPWARD AND DOWNWARD RUNS THROUGH SUCCESSIVE BEDS OF REFRACTORY BODIES IN A SHAFT FURNACE, SAID BEDS COMPRISING AN INTERMEDIATE BED OF RELATIVELY LARGE BODIES AND UPPER AND LOWER ADJACENT BEDS OF RELATIVELY SMALLER BODIES, AND HEATING SAID INTERMEDIATE BED TO A HIGH TEMPERATURE SUFFICIENT TO INDUCE THE OXIDATION OF NITROGEN BY INJECTION OF A FLUID COMBUSTIBLE ADJACENT THE JUNCTION OF SAID INTERMEDIATE BED AND THAT BED OF RELATIVELY SMALLER BODIES
References Cited (Backward Citations)
US111691A
Cited
USRE19757E
Cited
US777485A
Cited
US1062122A
Cited
US2121733A
Cited
US2272108A
Cited
US2421744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |