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Patent US2567461A successfully refreshed from Google Patents.
US2567461A
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Separation of gaseous mixtures at low temperatures
Assignee: PETROCARBON Ltd
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Filing: 1948-02-12
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Granted: 1951-09-11
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Expires: 1968-02-12
Abstract
No abstract record available.
Inventors
- 👤 Aicher Alfred August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:45
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0228; F25J3/0242; F25J3/0204; F25J3/0219; F25J3/0238; F25J2200/00; F25J2200/74; F25J2200/80; F25J2210/00; F25J2210/12; F25J2215/00; F25J2215/62; F25J2270/00; F25J2270/02; F25J2270/88; F25J2270/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE FRACTIONATION AT LOW TEMPERATURES OF A MIXTURE OF GASES IN A PLURALITY OF FRACTIONATING COLUMNS CONNECTED IN SERIES AND OPERATING AT SUCCESSIVELY LOWER PRESSURES AND PROVIDED WITH REFLUX CONDENSERS AND REBOILERS; THE PROCESS OF SUPPLYING COLD AND HEAT TO SAID CONDENSERS AND REBOILERS WHICH COMPRISES PASSING A COMPRESSED AND COOLED REFRIGERANT LIQUID IN A CLOSED CIRCUIT THROUGH A RELUX CONDENSER OF ONE FRACTIONATING COLUMN WHEREBY THE REFRIGERANT LIQUID IS EVAPORATED AND COLD SUPPLIED TO THE CONDENSER, PASSING AT LEAST PART OF THE RESULTING REFRIGERANT VAPOR THROUGH THE REBOILER OF SUCCEEDING FRACTIONATING COLUMN WHEREBY THE RE-
Claim 2
Dependent Claim
97 words
IN THE FRACTIONATION AT LOW TEMPERATURES OF A MIXTURE OF GASES IN A PLURALITY OF FRACTIONATING COLUMNS CONNECTED IN SERIES AND OPERATING AT SUCCESSIVELY LOWER PRESSURES AND PROVIDED WITH REFLUX CONDENSERS AND REBOILERS; THE PROCESS OF SUPPLYING COLD AND HEAT TO SAID CONDENSERS AND REBOILERS WHICH COMPRISES PASSING A COMPRESSED AND COOLED REFRIGERANT LIQUID IN A CLOSED CIRCUIT THROUGH A RELUX CONDENSER OF ONE FRACTIONATING COLUMN WHEREBY THE REFRIGERANT LIQUID IS EVAPORATED AND COLD SUPPLIED TO THE CONDENSER, PASSING AT LEAST PART OF THE RESULTING REFRIGERANT VAPOR THROUGH THE REBOILER OF SUCCEEDING FRACTIONATING COLUMN WHEREBY THE RE-
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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |