US3584998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making ammonia
Assignee: EIDP Inc
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Filing: 1968-07-03
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Granted: 1971-06-15
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Expires: 1988-07-03
Abstract
Abstract AMMONIA IS MADE WITHOUT USING A PRIMARY REFORMER BY PREHEATING THE AIR, STEAM AND NATURAL GAS TO ABOUT 2000*F. AND REACTING THESE STREAMS IN A SECONARY TYPE REFORMER. THE SYNTHESIS GAS IS THEN FED IN SEQUENCE TO A HEAT RECOVERY UNIT, A SHIFT CONVERTER, A CO2 ABSORBER, A METHANATOR IF NECESSARY, AND THEN TO A LOW TEMPERATURE PURIFIER WHICH REMOVES THE EXCESS NITROGEN, METHANE AND CARBON MONOXIDE. THE PURIFIED STREAM IS THEN COMPRESSED AND CONVERTED INTO AMMONIA IN THE SYNTHESIS CONVERTER.
Inventors
- 👤 Ralph V Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |