US2537046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing oxygen by the liquefaction and rectification of air
Assignee: Hydrocarbon Research Inc
•
Filing: 1949-02-24
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Granted: 1951-01-09
•
Expires: 1969-02-24
Abstract
No abstract record available.
Inventors
- 👤 Paul W Garbo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:28
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR PRODUCING OXYGEN BY THE LIQUEFACTION AND RECTIFICATION OF AIR IN A RECTIFICATION COLUMN, WHICH COMPRISES, PASSING A STREAM OF AIR UNDER PRESSURE THROUGH A PATH IN A REVERSING EXCHANGER TO RECOVER THE COLD CONTENT OF AN OUTGOING PRODUCT OF RECTIFICATION AND THUS COOL THE AIR TO A TEMPERATURE CLOSE TO ITS CONDENSATION POINT, PERIODICALLY REVERSING THE FLOW OF AIR AND RECTIFICATION PRODUCT THROUGH THEIR RESPECTIVE PATHS IN THE REVERSING EXCHANGER SO THAT UPON EACH OF SAID REVERSALS THE RECTIFICATION PRODUCT SUBSTANTIALLY COMPLETELY REMOVES THE CARBON DIOXIDE DEPOSITED IN THE REVERSING EXCHANGER DURING THE PRECEDING STEP OF THE PROCESS, INTRODUCING THE THUS COOLED AIR INTO THE RECTIFICATION COLUMN, PASSING LIQUID FROM SAID RECTIFICATION COLUMN INTO AND THROUGH AT LEAST THE COLD END OF SAID REVERSING EXCHANGER IN INDIRECT HEAT EXCHANGE RELATION WITH THE AIR AND RECTIFICATION
Claim 2
Dependent Claim
138 words
A PROCESS FOR PRODUCING OXYGEN BY THE LIQUEFACTION AND RECTIFICATION OF AIR IN A RECTIFICATION COLUMN, WHICH COMPRISES, PASSING A STREAM OF AIR UNDER PRESSURE THROUGH A PATH IN A REVERSING EXCHANGER TO RECOVER THE COLD CONTENT OF AN OUTGOING PRODUCT OF RECTIFICATION AND THUS COOL THE AIR TO A TEMPERATURE CLOSE TO ITS CONDENSATION POINT, PERIODICALLY REVERSING THE FLOW OF AIR AND RECTIFICATION PRODUCT THROUGH THEIR RESPECTIVE PATHS IN THE REVERSING EXCHANGER SO THAT UPON EACH OF SAID REVERSALS THE RECTIFICATION PRODUCT SUBSTANTIALLY COMPLETELY REMOVES THE CARBON DIOXIDE DEPOSITED IN THE REVERSING EXCHANGER DURING THE PRECEDING STEP OF THE PROCESS, INTRODUCING THE THUS COOLED AIR INTO THE RECTIFICATION COLUMN, PASSING LIQUID FROM SAID RECTIFICATION COLUMN INTO AND THROUGH AT LEAST THE COLD END OF SAID REVERSING EXCHANGER IN INDIRECT HEAT EXCHANGE RELATION WITH THE AIR AND RECTIFICATION
References Cited (Backward Citations)
US2460859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |