US2737784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for obtaining liquid oxygen
Assignee: Linde GmbH
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Filing: 1954-11-09
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Granted: 1956-03-13
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Expires: 1974-11-09
Abstract
No abstract record available.
Inventors
- 👤 Becker Rudolf
- 👤 Hartmann Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:15
CPC Classifications
F; F25; F25J; F25J5/00; F25J3/00; F25J3/02; F25J3/04; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
AN APPARATUS TO OBTAIN LIQUID OXYGEN BY THE RECTIFICATION OF COMPRESSED AIR LIQUEFIED AT LOWER TEMPERATURES, COMPRISING A TURBO-COMPRESSOR TO COMPRESS AIR TO A PRESSURE OF BETWEEN 3 TO 15 ATMOSPHERES EXCESS PRESSURE, TWO PERIODICALLY CHANGED-OVER REGENERATORS CONNECTED AT THEIR UPPER END PORTIONS TO THE TURBO-COMPRESSOR, A SEPARATING COLUMN TO DECOMPOSE THE COLD AIR SUPPLY THERETO MAINLY INTO OXYGEN AND NITROGEN, A FIRST AND SECOND HEATEXCHANGER CONNECTED SUCCESSIVELY IN SERIES BETWEEN THE REGENERATORS AT THE LOWER END PORTIONS THEREOF AND THE SEPARATING COLUMN AT THE UPPER END PORTION THEREOF, THE COMBINATION OF A THIRD HEAT-EXCHANGER AND AN EXPANSION TURBINE CONNECTED SUCCESSIVELY IN SERIES BETWEEN THE REGENERATORS ALSO AT THE LOWER END PORTIONS THEREOF AND THE SEPARATING COLUMN AT A LOCATION INTERMEDIATE THE ENDS THEREOF, A FILTER FOR LIQUID AIR CONNECTED AT ITS UPPER END PORTION TO THE LOWER END PORTIONS OF THE REGENERATORS AND AT ITS LOWER END PORTION TO THE UPPER END PORITON OF THE SEPARATING COLUMN THROUGH THE SECOND HEAT-EXCHANGER, AND A FOURTH AND FIFTH HEAT-EXCHANGER LOCATED WITHIN THE REGENERATORS AND CONNECTED AT THE TOP ENDS THEREOF SUCCESSIVELY THROUGH THE THIRD HEAT-EXCHANGER, THE BOTTOM OF THE SEPARATING COLUMN AND THE SECOND HEAT-EXCHANGER TO THE TOP OF THE SEPARATING COLUMN AND, AT THE LOWER END PORTIONS THEREOF, THROUGH THE FIRST HEAT-EXCHANGE TO THE UPPER END-PORTION OF THE LIQUID OXYGEN SEPARATOR.
Claim 2
Independent Claim
221 words
AN APPARATUS TO OBTAIN LIQUID OXYGEN BY THE RECTIFICATION OF COMPRESSED AIR LIQUEFIED AT LOWER TEMPERATURES, COMPRISING A TURBO-COMPRESSOR TO COMPRESS AIR TO A PRESSURE OF BETWEEN 3 TO 15 ATMOSPHERES EXCESS PRESSURE, TWO PERIODICALLY CHANGED-OVER REGENERATORS CONNECTED AT THEIR UPPER END PORTIONS TO THE TURBO-COMPRESSOR, A SEPARATING COLUMN TO DECOMPOSE THE COLD AIR SUPPLY THERETO MAINLY INTO OXYGEN AND NITROGEN, A FIRST AND SECOND HEATEXCHANGER CONNECTED SUCCESSIVELY IN SERIES BETWEEN THE REGENERATORS AT THE LOWER END PORTIONS THEREOF AND THE SEPARATING COLUMN AT THE UPPER END PORTION THEREOF, THE COMBINATION OF A THIRD HEAT-EXCHANGER AND AN EXPANSION TURBINE CONNECTED SUCCESSIVELY IN SERIES BETWEEN THE REGENERATORS ALSO AT THE LOWER END PORTIONS THEREOF AND THE SEPARATING COLUMN AT A LOCATION INTERMEDIATE THE ENDS THEREOF, A FILTER FOR LIQUID AIR CONNECTED AT ITS UPPER END PORTION TO THE LOWER END PORTIONS OF THE REGENERATORS AND AT ITS LOWER END PORTION TO THE UPPER END PORITON OF THE SEPARATING COLUMN THROUGH THE SECOND HEAT-EXCHANGER, AND A FOURTH AND FIFTH HEAT-EXCHANGER LOCATED WITHIN THE REGENERATORS AND CONNECTED AT THE TOP ENDS THEREOF SUCCESSIVELY THROUGH THE THIRD HEAT-EXCHANGER, THE BOTTOM OF THE SEPARATING COLUMN AND THE SECOND HEAT-EXCHANGER TO THE TOP OF THE SEPARATING COLUMN AND, AT THE LOWER END PORTIONS THEREOF, THROUGH THE FIRST HEAT-EXCHANGE TO THE UPPER END-PORTION OF THE LIQUID OXYGEN SEPARATOR.
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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |