US2578490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas purification
Assignee: Hercules Powder Co
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Filing: 1948-05-01
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Granted: 1951-12-11
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Expires: 1968-05-01
Abstract
No abstract record available.
Inventors
- 👤 James H Shapleigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:29
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN THE PROCESS OF PRODUCING HYDROGEN AND NITROGEN BY THE DISSOCIATION OF HYDROCARBON GASES AND VAPORS, THE IMPROVEMENT WHICH COMPRISES IN COMBINATION MAINTAINING A MIXTURE OF GASEOUS HYDROCARBON AND STEAM AT A TEMPERATURE BELOW THE THERMAL DECOMPOSITION TEMPERTURE OF THE HYDROCARBON; PASSING THE MIXTURE INTO CONTACT WITH NICKEL CATALYST AT A TEMPERATURE ABOVE THE THERMAL DECOMPOSITION TEMPERATURE OF THE HYDROCARBON IN THE PRESENCE OF NICKEL CATALYST TO OBTAIN A HYDROGEN-CARBON MONOXIDE MIXTURE SUBSTANTIALLY FREE OF DETRIMENTAL CARBON; INTERMIXING THE HYDROGEN-CARBON MONOXIDE MIXTURE WITH HYDROCARBON COMBUSTION PRODUCTS CONTAINING NITROGEN OXIDE TO CONVERT THE NITROGEN OXIDE TO NITROGEN BY REACTION WITH HYDROGEN IN THE PRESENCE OF IRON CATALYST TO THEREBY OBTAIN A MIXTURE COMPRISING HYDROGEN AND NITROGEN SUBSTANTIALLY FREE OF NITROGEN OXIDE; AND COOLING THE MIXTURE THUS FORMED.
Claim 2
Dependent Claim
126 words
IN THE PROCESS OF PRODUCING HYDROGEN AND NITROGEN BY THE DISSOCIATION OF HYDROCARBON GASES AND VAPORS, THE IMPROVEMENT WHICH COMPRISES IN COMBINATION MAINTAINING A MIXTURE OF GASEOUS HYDROCARBON AND STEAM AT A TEMPERATURE BELOW THE THERMAL DECOMPOSITION TEMPERTURE OF THE HYDROCARBON; PASSING THE MIXTURE INTO CONTACT WITH NICKEL CATALYST AT A TEMPERATURE ABOVE THE THERMAL DECOMPOSITION TEMPERATURE OF THE HYDROCARBON IN THE PRESENCE OF NICKEL CATALYST TO OBTAIN A HYDROGEN-CARBON MONOXIDE MIXTURE SUBSTANTIALLY FREE OF DETRIMENTAL CARBON; INTERMIXING THE HYDROGEN-CARBON MONOXIDE MIXTURE WITH HYDROCARBON COMBUSTION PRODUCTS CONTAINING NITROGEN OXIDE TO CONVERT THE NITROGEN OXIDE TO NITROGEN BY REACTION WITH HYDROGEN IN THE PRESENCE OF IRON CATALYST TO THEREBY OBTAIN A MIXTURE COMPRISING HYDROGEN AND NITROGEN SUBSTANTIALLY FREE OF NITROGEN OXIDE; AND COOLING THE MIXTURE THUS FORMED.
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) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |