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US3202482A
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Purification of helium contaminated by nitrogen
Assignee: HELI CHEM PRODUCTS Inc
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Filing: 1962-01-11
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Granted: 1965-08-24
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Expires: 1982-01-11
Abstract
No abstract record available.
Inventors
- 👤 Charles A Herster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:16
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/028; F25J3/029; C; C01; C01B; C01B23/00; F25J3/0204; F25J3/0209; F25J3/0219; F25J3/0233; F25J3/0242; F25J3/0257; F25J2205/00; F25J2205/50; F25J2210/00; F25J2210/20; F25J2245/00; F25J2245/02; F25J2260/00; F25J2260/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PROCESS FOR RECOVERING HELIUM FROM NATURAL GAS, THE STEPS WHICH COMPRISE CONTACTING NATURAL GAS WITH LIQUID HYDROCARBON OIL WHICH IS SUBSTANTIALLY PROPANE IN AN ABSORPTION ZONE TO REMOVE HIGHER HYDROCARBONS AND A SUBSTANTIAL PORTION OF METHANE FROM THE GAS STREAM, COOLING AND FRACTIONATING SAID GAS STREAM TO REMOVE A SUBSTANTIAL PORTION OF THE NITROGEN COMPONENT AND REDUCE THE HYDROCARBON CONTENT TO A MINOR AMOUNT OF METHANE IN THE GAS STREAM, SUBJECTING SAID GAS STREAM TO STREAM REFORMING CONDITIONS TO INCREASE THE HYDROGEN CONTENT OF THE GAS STREAM, CONTACTING SAID GAS STREAM WITH AMMONIA SYNTHESIS CATALYST UNDER CONDITIONS PRODUCING LIQUID AM-
Claim 2
Dependent Claim
102 words
IN A PROCESS FOR RECOVERING HELIUM FROM NATURAL GAS, THE STEPS WHICH COMPRISE CONTACTING NATURAL GAS WITH LIQUID HYDROCARBON OIL WHICH IS SUBSTANTIALLY PROPANE IN AN ABSORPTION ZONE TO REMOVE HIGHER HYDROCARBONS AND A SUBSTANTIAL PORTION OF METHANE FROM THE GAS STREAM, COOLING AND FRACTIONATING SAID GAS STREAM TO REMOVE A SUBSTANTIAL PORTION OF THE NITROGEN COMPONENT AND REDUCE THE HYDROCARBON CONTENT TO A MINOR AMOUNT OF METHANE IN THE GAS STREAM, SUBJECTING SAID GAS STREAM TO STREAM REFORMING CONDITIONS TO INCREASE THE HYDROGEN CONTENT OF THE GAS STREAM, CONTACTING SAID GAS STREAM WITH AMMONIA SYNTHESIS CATALYST UNDER CONDITIONS PRODUCING LIQUID AM-
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |