US2552560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing oxygen
Assignee: Hydrocarbon Research Inc
•
Filing: 1945-12-05
•
Granted: 1951-05-15
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Expires: 1965-12-05
Abstract
No abstract record available.
Inventors
- 👤 Frank J Jenny
- 👤 Edward G Scheibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A PROCESS FOR PRODUCING OXYGEN BY THE LIQUEFACTION AND RECTIFICATION OF AIR, WHICH COMPRISES, PASSING A STREAM OF AIR AT ABOUT 70 TO ABOUT 85 POUNDS GAUGE THROUGH A PATH IN AT LEAST TWO ZONES IN SERIES, EACH OF SAID ZONES CONTAINING AT LEAST THREE PATHS IN HEAT EXCHANGE RELATION WITH EACH OTHER, PASSING RESPECTIVELY STREAMS OF OXYGEN AND NITROGEN PRODUCTS OF RECTIFICATION THROUGH TWO OTHER PATHS IN SAID ZONES IN HEAT EXCHANGE RELATION WITH THE AIR PASSING THERETHROUGH, EXPANDING A MINOR PORTION OF THE AIR AND IMPARTING THE REFRIGERATION THUS PRODUCED TO AT LEAST ONE OF SAID STREAMS DURING ITS FLOW BETWEEN THE FIRST ZONE AND A SECOND ZONE, REGULATING THE FLOW OF AIR NITROGEN AND OXYGEN INTO AND FROM SAID SECOND ZONE SO THAT THE DIFFERENCE BETWEEN THE TEMPERATURE OF THE AIR AND THE WEIGHTED AVERAGE TEMPERATURE OF THE NITROGEN AND OXYGEN AT THE COLDER END OF SAID ZONE FALLS WITHIN THE RANGE OF ABOUT 5* TO ABOUT 10* F. AND THE TEMPERATURE AT THE COLDER END OF SAID ZONE IS SUCH AS TO EFFECT SUBSTANTIALLY COMPLETE REMOVAL OF CARBON DIOXIDE FROM THE AIR IN ITS PASSAGE THROUGH ITS PATH IN SAID ZONE, PASSING THE AIR FROM THE SECOND ZONE TO A RECTI-
Claim 2
Dependent Claim
205 words
A PROCESS FOR PRODUCING OXYGEN BY THE LIQUEFACTION AND RECTIFICATION OF AIR, WHICH COMPRISES, PASSING A STREAM OF AIR AT ABOUT 70 TO ABOUT 85 POUNDS GAUGE THROUGH A PATH IN AT LEAST TWO ZONES IN SERIES, EACH OF SAID ZONES CONTAINING AT LEAST THREE PATHS IN HEAT EXCHANGE RELATION WITH EACH OTHER, PASSING RESPECTIVELY STREAMS OF OXYGEN AND NITROGEN PRODUCTS OF RECTIFICATION THROUGH TWO OTHER PATHS IN SAID ZONES IN HEAT EXCHANGE RELATION WITH THE AIR PASSING THERETHROUGH, EXPANDING A MINOR PORTION OF THE AIR AND IMPARTING THE REFRIGERATION THUS PRODUCED TO AT LEAST ONE OF SAID STREAMS DURING ITS FLOW BETWEEN THE FIRST ZONE AND A SECOND ZONE, REGULATING THE FLOW OF AIR NITROGEN AND OXYGEN INTO AND FROM SAID SECOND ZONE SO THAT THE DIFFERENCE BETWEEN THE TEMPERATURE OF THE AIR AND THE WEIGHTED AVERAGE TEMPERATURE OF THE NITROGEN AND OXYGEN AT THE COLDER END OF SAID ZONE FALLS WITHIN THE RANGE OF ABOUT 5* TO ABOUT 10* F. AND THE TEMPERATURE AT THE COLDER END OF SAID ZONE IS SUCH AS TO EFFECT SUBSTANTIALLY COMPLETE REMOVAL OF CARBON DIOXIDE FROM THE AIR IN ITS PASSAGE THROUGH ITS PATH IN SAID ZONE, PASSING THE AIR FROM THE SECOND ZONE TO A RECTI-
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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |