Patent US1474773A successfully refreshed from Google Patents.
Patent US3073129A successfully refreshed from Google Patents.
US3073129A
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Process for degassing an ethylenic liquid
Assignee: Air Liquide SA
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Filing: 1959-11-18
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Granted: 1963-01-15
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Expires: 1979-11-18
Abstract
No abstract record available.
Inventors
- 👤 Grenier Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:47
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0242; C; C07; C07C; C07C7/00; C07C7/04; F25J3/0204; F25J3/0219; F25J3/0233; F25J3/0238; F25J2200/00; F25J2200/76; F25J2205/00; F25J2205/02; F25J2205/04; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR SEPARATING IN SUCCESSIVE RECTIFYING ZONES A LIQUID RICH IN ETHYLENE AND IN ETHANE, WHICH HAS BEEN OBTAINED BY PARTIAL CONDENSATION AT LOW TEMPERATURES OF A GASEOUS MIXTURE UNDER PRESSURE, INTO A FRACTION CONTAINING METHANE AND OTHER VOLATILE GASES, ETHYLENE, ETHANE AND A C3 HYDROCARBONS FRACTION, COMPRISING EXPANDING SAID LIQUID TO A RELATIVELY LOW PRESSURE, THEN SEPARATING IT BY RECTIFICATION IN A FIRST RECTIFYING ZONE INTO A FRACTION CONTAINING METHANE AND OTHER VOLATILE GASES AND HIGHER BOILING LIQUID C2-C3 HYDROCARBONS MIXTURE, FEEDING SAID
Claim 2
Dependent Claim
85 words
A PROCESS FOR SEPARATING IN SUCCESSIVE RECTIFYING ZONES A LIQUID RICH IN ETHYLENE AND IN ETHANE, WHICH HAS BEEN OBTAINED BY PARTIAL CONDENSATION AT LOW TEMPERATURES OF A GASEOUS MIXTURE UNDER PRESSURE, INTO A FRACTION CONTAINING METHANE AND OTHER VOLATILE GASES, ETHYLENE, ETHANE AND A C3 HYDROCARBONS FRACTION, COMPRISING EXPANDING SAID LIQUID TO A RELATIVELY LOW PRESSURE, THEN SEPARATING IT BY RECTIFICATION IN A FIRST RECTIFYING ZONE INTO A FRACTION CONTAINING METHANE AND OTHER VOLATILE GASES AND HIGHER BOILING LIQUID C2-C3 HYDROCARBONS MIXTURE, FEEDING SAID
References Cited (Backward Citations)
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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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |