Patent US2999493A successfully refreshed from Google Patents.
Patent US2743590A successfully refreshed from Google Patents.
US2743590A
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Method for the fractionation of gas mixtures
Assignee: Air Liquide SA
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Filing: 1952-11-29
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Granted: 1956-05-01
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Expires: 1972-11-29
Abstract
No abstract record available.
Inventors
- 👤 Grunberg Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:33
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J3/0242; F25J3/0252; F25J2200/00; F25J2200/04; F25J2200/70; F25J2200/74; F25J2200/76; F25J2200/78; F25J2200/80; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/12; F25J2270/00; F25J2270/02; F25J2270/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR THE CONDENSATION AT LOW TEMPERATURE OF THE MORE EASILY CONDENSABLE PORTION OF A GASEOUS MIXTURE COMPRISING, COOLING AND PARTIALLY LIQUEFYING THE COMPRESSED GAS MIXTURE BY HEAT EXCHANGE WITH AT LEAST ONE COLD EXPANDED OUTPUT COMPONENT, RECTIFYING UNDER PRESSURE THE GASEOUS RESIDUE OF THE ABOVE MENTIONED PARTIAL LIQUEFACTION, SAID RECTIFICATION YIELDING ON ONE HAND A GAS MADE UP WITH THE LESS CONDENSABLE PORTION OF THE GASEOUS MIXTURE AND ON THE OTHER HAND A LIQUID, EXPANDING SAID
Claim 2
Independent Claim
78 words
A METHOD FOR THE CONDENSATION AT LOW TEMPERATURE OF THE MORE EASILY CONDENSABLE PORTION OF A GASEOUS MIXTURE COMPRISING, COOLING AND PARTIALLY LIQUEFYING THE COMPRESSED GAS MIXTURE BY HEAT EXCHANGE WITH AT LEAST ONE COLD EXPANDED OUTPUT COMPONENT, RECTIFYING UNDER PRESSURE THE GASEOUS RESIDUE OF THE ABOVE MENTIONED PARTIAL LIQUEFACTION, SAID RECTIFICATION YIELDING ON ONE HAND A GAS MADE UP WITH THE LESS CONDENSABLE PORTION OF THE GASEOUS MIXTURE AND ON THE OTHER HAND A LIQUID, EXPANDING SAID
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |