US3327487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ernst karwat
Assignee: —
•
Filing: 1964-03-17
•
Granted: 1967-06-27
•
Expires: 1984-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:10
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0276; C; C01; C01B; C01B3/00; C01B3/02; C01B3/025; F25J3/0204; F25J3/0219; F25J3/0223; F25J3/0233; F25J3/0261; F25J2205/00; F25J2205/02; F25J2205/04; F25J2205/24; F25J2205/30; F25J2210/00; F25J2210/04; F25J2210/14; F25J2210/42; F25J2240/00; F25J2240/02; F25J2245/00; F25J2245/02; F25J2270/00; F25J2270/04; F25J2270/08; F25J2270/42; F25J2270/88; F25J2290/00; F25J2290/62; Y; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A PROCESS FOR THE PRODUCTION OF A CO-FREE H2N2 GAS MIXTURE, PARTICULARLY OF NH3-SYNTHESIS GAS, FROM A HYDROGEN-CONTAINING GASEOUS MIXTURE IN WHICH HYDROGEN AS A MAIN CONSTITUDENT IS ACCOMPANIED BY ONE OR MORE OF HYDROCARBONS, OXYGEN COMPOUNDS OF CARBON, NITROGEN, MOISTURE, AND SULFIDE IMPURITIES, WHICH PROCESS COMPRISES THE STEPS OF COOLING UNDER PRESSURE SUCH A GAS MIXTURE IN A FIRST REGENERATOR, THEREBY SEPARATING CONDENSABLES AT A SUBSTANTIAL LOW TEMPERATURE BY PARTIALL CONDENSATION FROM SAID GASEOUS MIXTURE TO BOTAIN A CRUDE HYDROGEN FRACTION, AND WASHING THE THUS SEPARATED CRUDE HYDROGEN FRACTION WITH LIQUID NITROGEN TO FORM A CO-FREE GASEOUS MIXTURE OF HYDROGEN AND NITROGEN AND SIMULTANEOUSLY DISSOLVING CO IN THE LIQUID NITROGEN, THE IMPROVEMENT COMPRISING A STEP PRECEDING SAID WASHING OF THE THUS SEPARATED CRUDE HYDROGEN FRACTION OF: PASSING SAID THUS SEPARATED CRUDE HYDROGEN FRACTION THROUGH A SECOND REGENERATOR WHICH WAS TRAVERSED DURING A PREVIOUS CYCLE BY SAID HYDROGEN-CONTAINING
Claim 2
Dependent Claim
149 words
IN A PROCESS FOR THE PRODUCTION OF A CO-FREE H2N2 GAS MIXTURE, PARTICULARLY OF NH3-SYNTHESIS GAS, FROM A HYDROGEN-CONTAINING GASEOUS MIXTURE IN WHICH HYDROGEN AS A MAIN CONSTITUDENT IS ACCOMPANIED BY ONE OR MORE OF HYDROCARBONS, OXYGEN COMPOUNDS OF CARBON, NITROGEN, MOISTURE, AND SULFIDE IMPURITIES, WHICH PROCESS COMPRISES THE STEPS OF COOLING UNDER PRESSURE SUCH A GAS MIXTURE IN A FIRST REGENERATOR, THEREBY SEPARATING CONDENSABLES AT A SUBSTANTIAL LOW TEMPERATURE BY PARTIALL CONDENSATION FROM SAID GASEOUS MIXTURE TO BOTAIN A CRUDE HYDROGEN FRACTION, AND WASHING THE THUS SEPARATED CRUDE HYDROGEN FRACTION WITH LIQUID NITROGEN TO FORM A CO-FREE GASEOUS MIXTURE OF HYDROGEN AND NITROGEN AND SIMULTANEOUSLY DISSOLVING CO IN THE LIQUID NITROGEN, THE IMPROVEMENT COMPRISING A STEP PRECEDING SAID WASHING OF THE THUS SEPARATED CRUDE HYDROGEN FRACTION OF: PASSING SAID THUS SEPARATED CRUDE HYDROGEN FRACTION THROUGH A SECOND REGENERATOR WHICH WAS TRAVERSED DURING A PREVIOUS CYCLE BY SAID HYDROGEN-CONTAINING
References Cited (Backward Citations)
FR1141196A
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US2936593A
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US2962867A
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US3100696A
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US3105360A
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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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |