US2519955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrocarbon-oxygen mixtures
Assignee: Shell Development Co
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Filing: 1946-09-03
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Granted: 1950-08-22
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Expires: 1966-09-03
Abstract
No abstract record available.
Inventors
- 👤 Philip H Deming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:35
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0209; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0257; F25J3/04; F25J3/04248; F25J3/04254; F25J3/04284; F25J3/04309; F25J3/04315; F25J3/044; F25J3/04521; F25J3/04527; F25J3/04539; F25J2200/00; F25J2200/02; F25J2200/50; F25J2200/74; F25J2200/78; F25J2200/90; F25J2200/94; F25J2205/00; F25J2205/50; F25J2205/90; F25J2210/00; F25J2210/02; F25J2210/40; F25J2210/60; F25J2240/00; F25J2240/02; F25J2240/12; F25J2260/00; F25J2260/60; F25J2270/00; F25J2270/04; F25J2290/00; F25J2290/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE METHOD OF PRODUCING METHANE-OXYGEN MIXTURES WHICH COMPRISES: COUNTERCURRENTLY CONTACTING IN A RECTIFYING ABSORPTION ZONE AN UPWARDLY FLOWING STREAM OF PRECOOLED AIR AND A DOWNWARDLY FLOWING STREAM OF A LIQUEFLED PORTION OF NATURAL GAS CONTAINING A MAJOR PROPORTION OF METHANE TO PRODUCE A SEPARATED STREAM OF NITROGEN WHICH IS SUBSTANTIALLY FREE FROM, OXYGEN AND HYDROCARBONS AND A LIQUEFLED PHASE COMPRISING NATURAL GAS HYDROCARBONS AND OXYGEN, AND A SUBSEQUENTLY COUNTERCURENTLY CONTACTING THE AFORESAID LIQUEFLED PHASE IN A STRIPPING ZONE WITH LOW TEMPERATURE METHANE VAPOR TO PRODUCE A METHANE-OXYGEN FRACTION CONTAINING SUBSTANTIAL PROPORTIONS EACH OF METHANE AND OF OXYGEN AND A RESIDUAL OXYGEN-LEAN LIQUEFIED NATURAL-GAS PHASE.
Claim 2
Independent Claim
104 words
THE METHOD OF PRODUCING METHANE-OXYGEN MIXTURES WHICH COMPRISES: COUNTERCURRENTLY CONTACTING IN A RECTIFYING ABSORPTION ZONE AN UPWARDLY FLOWING STREAM OF PRECOOLED AIR AND A DOWNWARDLY FLOWING STREAM OF A LIQUEFLED PORTION OF NATURAL GAS CONTAINING A MAJOR PROPORTION OF METHANE TO PRODUCE A SEPARATED STREAM OF NITROGEN WHICH IS SUBSTANTIALLY FREE FROM, OXYGEN AND HYDROCARBONS AND A LIQUEFLED PHASE COMPRISING NATURAL GAS HYDROCARBONS AND OXYGEN, AND A SUBSEQUENTLY COUNTERCURENTLY CONTACTING THE AFORESAID LIQUEFLED PHASE IN A STRIPPING ZONE WITH LOW TEMPERATURE METHANE VAPOR TO PRODUCE A METHANE-OXYGEN FRACTION CONTAINING SUBSTANTIAL PROPORTIONS EACH OF METHANE AND OF OXYGEN AND A RESIDUAL OXYGEN-LEAN LIQUEFIED NATURAL-GAS PHASE.
References Cited (Backward Citations)
US2195976A
Cited
US2185980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |