US2744394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of gaseous mixtures by fractionation
Assignee: BADGER Manufacturing Co
•
Filing: 1953-06-02
•
Granted: 1956-05-08
•
Expires: 1973-06-02
Abstract
No abstract record available.
Inventors
- 👤 Roger H Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:50
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0257; C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; F25J3/0204; F25J3/0209; F25J3/0233; F25J3/0238; F25J2205/00; F25J2205/50; F25J2270/00; F25J2270/12; F25J2270/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD FOR SEPARATING NITROGEN FROM RAW NATURAL GAS, INCLUDING SUBJECTION OF THE GAS TO CONTINUOUS FRACTIONATION WITH ADDITION AS REFLUX OF N-PENTANE, THE PRESSURE BEING ADJUSTED TO A VALUE IN EXCESS OF CRITICAL FOR THE NITROGEN-METHANE BINARY AND AT WHICH TWO PHASES EXIST FOR THE BINARIES OF PENTANE WITH EACH OF NITROGEN AND METHANE, THE TEMPERATURE RANGE AND THE AMOUNT OF REFLUX ADDED BEING ADJUSTED TO REMOVE SUBSTANTIALLY ALL OF THE NITROGEN OVERHEAD, CONTINUOUS WITHDRAWAL AS BOTTOMS OF A LIQUID CONTAINING METHANE AND PENTANE, AND CONTINUOUS WITHDRAWAL OF A SIDESTREAM IMMEDIATE BETWEEN THE RAW GAS INLET AND THE BOTTOMS CONSISTING OF SUBSTANTIALLY PURE METHANE.
Claim 2
Independent Claim
105 words
A METHOD FOR SEPARATING NITROGEN FROM RAW NATURAL GAS, INCLUDING SUBJECTION OF THE GAS TO CONTINUOUS FRACTIONATION WITH ADDITION AS REFLUX OF N-PENTANE, THE PRESSURE BEING ADJUSTED TO A VALUE IN EXCESS OF CRITICAL FOR THE NITROGEN-METHANE BINARY AND AT WHICH TWO PHASES EXIST FOR THE BINARIES OF PENTANE WITH EACH OF NITROGEN AND METHANE, THE TEMPERATURE RANGE AND THE AMOUNT OF REFLUX ADDED BEING ADJUSTED TO REMOVE SUBSTANTIALLY ALL OF THE NITROGEN OVERHEAD, CONTINUOUS WITHDRAWAL AS BOTTOMS OF A LIQUID CONTAINING METHANE AND PENTANE, AND CONTINUOUS WITHDRAWAL OF A SIDESTREAM IMMEDIATE BETWEEN THE RAW GAS INLET AND THE BOTTOMS CONSISTING OF SUBSTANTIALLY PURE METHANE.
References Cited (Backward Citations)
US2067349A
Cited
US2295211A
Cited
US2596785A
Cited
US2516507A
Cited
US2610704A
Cited
US2529312A
Cited
US2603310A
Cited
US2608270A
Cited
US2662049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |