Patent US2936593A successfully refreshed from Google Patents.
US2936593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of ammonia synthesis gas
Assignee: Air Liquide SA
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Filing: 1957-04-26
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Granted: 1960-05-17
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Expires: 1977-04-26
Abstract
No abstract record available.
Inventors
- 👤 Jacques F Grunberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:28
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0276; F25J3/0204; F25J3/0219; F25J3/0223; F25J3/0233; F25J3/0261; F25J2205/00; F25J2205/02; F25J2205/04; F25J2205/30; F25J2210/00; F25J2210/14; F25J2210/20; F25J2210/42; F25J2235/00; F25J2235/42; Y; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A PROCESS FOR PRODUCING AMMONIA SYNTHESIS GAS IN WHICH IMPURE HYDROGEN-RICH FEED GAS STREAM UNDER PRESSURE IS COOLED, WHEREBY ITS IMPURITIES ARE AT LEAST PARTLY LIQUEFIED AND SEPARATED THEREFROM, A NITROGEN STREAM IS COOLED AND LIQUEFIED UNDER PRESSURE, THEN VAPORIZED INTO SAID PURIFIED HYDROGEN-RICH GAS STREAM, SAID LIQUID IMPURITIES ARE VAPORIZED AND WARMED AND SAID HYDROGEN-NITROGEN GASEOUS MIXTURE IS WARNED BY HEAT EXCHANGE WITH SAID IMPURE HYDROGEN-RICH GAS AND NITROGEN STREAMS, THE IMPROVEMENT OF COOLING AND LIQUEFYING SAID NITROGEN STREAM AT A PRESSURE LOWER THAN THE PRESSURE OF SAID PURIFIED HYDROGEN-RICH GAS STREAM, THEN COMPRESSING THE LIQUID NITROGEN TO A PRESSURE AT LEAST AS HIGH AS THAT OF SAID PURIFIED HYDROGEN-RICH GAS STREAM.
Claim 2
Dependent Claim
114 words
IN A PROCESS FOR PRODUCING AMMONIA SYNTHESIS GAS IN WHICH IMPURE HYDROGEN-RICH FEED GAS STREAM UNDER PRESSURE IS COOLED, WHEREBY ITS IMPURITIES ARE AT LEAST PARTLY LIQUEFIED AND SEPARATED THEREFROM, A NITROGEN STREAM IS COOLED AND LIQUEFIED UNDER PRESSURE, THEN VAPORIZED INTO SAID PURIFIED HYDROGEN-RICH GAS STREAM, SAID LIQUID IMPURITIES ARE VAPORIZED AND WARMED AND SAID HYDROGEN-NITROGEN GASEOUS MIXTURE IS WARNED BY HEAT EXCHANGE WITH SAID IMPURE HYDROGEN-RICH GAS AND NITROGEN STREAMS, THE IMPROVEMENT OF COOLING AND LIQUEFYING SAID NITROGEN STREAM AT A PRESSURE LOWER THAN THE PRESSURE OF SAID PURIFIED HYDROGEN-RICH GAS STREAM, THEN COMPRESSING THE LIQUID NITROGEN TO A PRESSURE AT LEAST AS HIGH AS THAT OF SAID PURIFIED HYDROGEN-RICH GAS STREAM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |