Patent US3273349A successfully refreshed from Google Patents.
US3273349A
Expired / Lapsed
US
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Variable demand air rectification plant with recycle
Assignee: Airco Inc
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Filing: 1965-02-15
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Granted: 1966-09-20
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Expires: 1985-02-15
Abstract
No abstract record available.
Inventors
- 👤 Litvin Milton
- 👤 Allen V Muska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:03
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04151; F25J3/04187; F25J3/04218; F25J3/04224; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/04472; F25J3/04496; F25J3/04503; F25J3/04509; F25J2250/00; F25J2250/30; F25J2250/42; F25J2250/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS FOR SUPPLY OF GASEOUS OXYGEN FROM AN AIR SEPARATION PLANT SO AS TO MEET VARYING DEMANDS COMPRISING THE STEPS OF PASSING GASEOUS OXYGEN PRODUCT AT A SUBSTANTIALLY STEADY STATE FROM THE PLANT TO A SOURCE OF DEMAND, STORING LIQUID OXYGEN PRODUCT FROM SAID PLANT, VAPORIZING SAID LIQUID PRODUCT IN A VAPORIZER IN RESPONSE TO DEMAND, COMPRESSING WASTE NITROGEN FROM SAID PLANT, COOLING SUBSTANTIALLY ALL OF SAID COMPRESSED WASTE NITROGEN BY HEAT EXCHANGE WITH SAID LIQUID OXYGEN PRODUCT BEING VAPORIZED, THROTTLING SAID COMPRESSED AND COOLED WASTE NITROGEN TO LIQUEFY IT, CONTROLLABLY APPLYING SAID LIQUEFIED WASTE NITROGEN TO SAID PLANT TO PROVIDE REFRIGERATION THEREFOR, AND PASSING VAPORS FROM SAID LIQUIDFIED NITROGEN IN HEAT EXCHANGE WITH THE COMPRESSED NITROGEN STREAM AND THEN INTO MIXTURE WITH THE WASTE NITROGEN BEFORE SAID WASTE NITROGEN IS COMPRESSED.
Claim 2
Dependent Claim
133 words
A PROCESS FOR SUPPLY OF GASEOUS OXYGEN FROM AN AIR SEPARATION PLANT SO AS TO MEET VARYING DEMANDS COMPRISING THE STEPS OF PASSING GASEOUS OXYGEN PRODUCT AT A SUBSTANTIALLY STEADY STATE FROM THE PLANT TO A SOURCE OF DEMAND, STORING LIQUID OXYGEN PRODUCT FROM SAID PLANT, VAPORIZING SAID LIQUID PRODUCT IN A VAPORIZER IN RESPONSE TO DEMAND, COMPRESSING WASTE NITROGEN FROM SAID PLANT, COOLING SUBSTANTIALLY ALL OF SAID COMPRESSED WASTE NITROGEN BY HEAT EXCHANGE WITH SAID LIQUID OXYGEN PRODUCT BEING VAPORIZED, THROTTLING SAID COMPRESSED AND COOLED WASTE NITROGEN TO LIQUEFY IT, CONTROLLABLY APPLYING SAID LIQUEFIED WASTE NITROGEN TO SAID PLANT TO PROVIDE REFRIGERATION THEREFOR, AND PASSING VAPORS FROM SAID LIQUIDFIED NITROGEN IN HEAT EXCHANGE WITH THE COMPRESSED NITROGEN STREAM AND THEN INTO MIXTURE WITH THE WASTE NITROGEN BEFORE SAID WASTE NITROGEN IS COMPRESSED.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |