US2926501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for recovering nitrogen from air by use of a cold boiling liquid such as nitrogen
Assignee: Union Stock Yard and Transit Co
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Filing: 1956-12-24
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Granted: 1960-03-01
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Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:06
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04224; F25J3/04254; F25J3/0426; F25J3/04278; F25J3/044; F25J3/04521; F25J3/04563; F25D; F25D3/00; F25D3/10; F25J2200/00; F25J2200/70; F25J2205/00; F25J2205/02; F25J2210/00; F25J2210/42; F25J2270/00; F25J2270/02; F25J2270/90; F25J2290/00; F25J2290/62; Y; Y10; Y10S; Y10S62/00; Y10S62/912; Y10S62/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN COMBINATION, A REFRIGERATION CIRCUIT ADAPTED TO USE NITROGEN AS A REFRIGERANT AND A SEPARATION CIRCUIT ADAPTED TO RECOVER NITROGEN IN GASEOUS PHASE FROM ATMOSPHERIC AIR AND SUPPLY IT TO THE REFRIGERATION CIRCUIT, THE REFRIGERATION CIRCUIT INCLUDING IN SERIES NITROGEN LIQUEFACTION MEANS, LIQUID NITROGEN STORAGE MEANS AND A REFRIGERATION VESSEL, WHEREIN LIQUID NITROGEN AT APPROXIMATELY ATMOSPHERE PRESSURE CONTACTS MATERIAL TO BE REFRIGERATED, IS EVAPORATED THEREBY AND FROM WHICH NITROGEN IN GASEOUS PHASE IN RETURNED WITHOUT SUBSTANTIAL LOSS OF TEMPERATURE TO THE LIQUEFACTION MEANS, THE SEPARATION CIRCUIT INCLUDING CONNECTED MEANS FOR COMPRESSING AIR,
Claim 2
Dependent Claim
92 words
IN COMBINATION, A REFRIGERATION CIRCUIT ADAPTED TO USE NITROGEN AS A REFRIGERANT AND A SEPARATION CIRCUIT ADAPTED TO RECOVER NITROGEN IN GASEOUS PHASE FROM ATMOSPHERIC AIR AND SUPPLY IT TO THE REFRIGERATION CIRCUIT, THE REFRIGERATION CIRCUIT INCLUDING IN SERIES NITROGEN LIQUEFACTION MEANS, LIQUID NITROGEN STORAGE MEANS AND A REFRIGERATION VESSEL, WHEREIN LIQUID NITROGEN AT APPROXIMATELY ATMOSPHERE PRESSURE CONTACTS MATERIAL TO BE REFRIGERATED, IS EVAPORATED THEREBY AND FROM WHICH NITROGEN IN GASEOUS PHASE IN RETURNED WITHOUT SUBSTANTIAL LOSS OF TEMPERATURE TO THE LIQUEFACTION MEANS, THE SEPARATION CIRCUIT INCLUDING CONNECTED MEANS FOR COMPRESSING AIR,
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) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |