Patent US2760352A successfully refreshed from Google Patents.
US2760352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of gases
Assignee: Phillips Petroleum Co
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Filing: 1951-11-09
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Granted: 1956-08-28
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Expires: 1971-11-09
Abstract
No abstract record available.
Inventors
- 👤 Karl H Hachmuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:14
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0257; F25J3/0204; F25J3/0219; F25J3/0252; F25J3/08; F25J2210/00; F25J2210/20; F25J2215/00; F25J2215/10; F25J2220/00; F25J2220/90; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10S62/00; Y10S62/919; Y10S62/931; Y10S62/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE PROCESS OF SEPARATING DEUTERIUM HYDRIDE FROM A GASEOUS MIXTURE OF NITROGEN HYDROGEN WHICH PRISES; SUBJECTING A GASEOUS MIXTURE OF NITROGEN AND HYDROGEN IN A WEIGHT RATIO SUITABLE FOR USE IN AN AMMONIA SYNTHESIS REACTION TO LOW TEMPERATUURE FRACTIONATION IN A FIRST FRACTIONATION ZONE; RECOVERING LIQUID NITROGEN FROM THE BOTTOM OF SAID FIRST FRACTIONATION ZONE AND RECOVERING GASEOUS HYDROGEN OVERHEAD FROM SAID FRACTIONATION ZONE; RETURNING SAID RECOVERED GASEOUS HYDROGEN TO AN INTERMEDIATE SECTION OF SAID FIRST FRACTIONATION ZONE IN INDIRECT HEAT EXCHANGE RELATIONSHIP WITH THE GASEOUS MIXTURE OF NITROGEN AND HYDROGEN THEREIN; COOLING BY EXPANSION SAID RETURN GASEOUS HYDROGEN; SUBJECTING THE RESULTING EXPANDED GASEOUS HYDROGEN TO FRACTIONATION WITHIN A SECOND FRACTIONATION ZONE AND RECOVERING FROM THE BOTTOM OF SAID SECOND FRACTIONATION ZONE A DEUTERIUM HYDRIDE CONCENTRATE.
Claim 2
Dependent Claim
126 words
THE PROCESS OF SEPARATING DEUTERIUM HYDRIDE FROM A GASEOUS MIXTURE OF NITROGEN HYDROGEN WHICH PRISES; SUBJECTING A GASEOUS MIXTURE OF NITROGEN AND HYDROGEN IN A WEIGHT RATIO SUITABLE FOR USE IN AN AMMONIA SYNTHESIS REACTION TO LOW TEMPERATUURE FRACTIONATION IN A FIRST FRACTIONATION ZONE; RECOVERING LIQUID NITROGEN FROM THE BOTTOM OF SAID FIRST FRACTIONATION ZONE AND RECOVERING GASEOUS HYDROGEN OVERHEAD FROM SAID FRACTIONATION ZONE; RETURNING SAID RECOVERED GASEOUS HYDROGEN TO AN INTERMEDIATE SECTION OF SAID FIRST FRACTIONATION ZONE IN INDIRECT HEAT EXCHANGE RELATIONSHIP WITH THE GASEOUS MIXTURE OF NITROGEN AND HYDROGEN THEREIN; COOLING BY EXPANSION SAID RETURN GASEOUS HYDROGEN; SUBJECTING THE RESULTING EXPANDED GASEOUS HYDROGEN TO FRACTIONATION WITHIN A SECOND FRACTIONATION ZONE AND RECOVERING FROM THE BOTTOM OF SAID SECOND FRACTIONATION ZONE A DEUTERIUM HYDRIDE CONCENTRATE.
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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) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |