US3327490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recombining separated gaseous nitrogen and vaporized liquid nitrogen with air to produce a constant gaseous feed rate
Assignee: Air Liquide SA
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Filing: 1964-09-14
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Granted: 1967-06-27
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Expires: 1984-09-14
Abstract
No abstract record available.
Inventors
- 👤 Grenier Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:31
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/18; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/044; F25J3/04406; F25J3/04412; F25J3/04472; F25J3/04496; F25J3/04521; F25J3/04563; F25J3/04612; F25J3/04763; F25J3/04769; F25J3/04812; F25J2200/00; F25J2200/50; F25J2200/52; F25J2210/00; F25J2210/04; F25J2210/42; F25J2245/00; F25J2245/42; F25J2245/90; F25J2250/00; F25J2250/30; F25J2250/42; F25J2260/00; F25J2260/42; F25J2260/44; F25J2290/00; F25J2290/62; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y10; Y10S; Y10S62/00; Y10S62/939; Y10S62/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
A METHOD FOR THE PRODUCTION OF COLD BY THE VAPORIZATION OF LIQUID NITROGEN ACCORDING TO A VARIABLE COLD DEMAND, COMPRISING THE STEPS OF: (A) COOLING A CONSTANT AMOUNT OF A GASEOUS FEED AND SEPARATING FROM THE COOLED FEED A GASEOUS FRACTION CONTAINING ANY OXYGEN PRESENT IN SAID FEED, GASEOUS NITROGEN AND LIQUID NITROGEN; (B) WARMING UP BY HEAT EXCHANGE WITH SAID GASEOUS FEED SAID GASEOUS FRACTION, AND DISCHARGING IT; (C) WARMING UP BY HEAT EXCHANGE WITH SAID GASEOUS FEED SAID GASEOUS NITROGEN; (D) ESTABLISHING A STORE OF SAID SEPARATED LIQUID NITROGEN; (E) UTILIZING CONTROLLED AMOUNTS OF LIQUID NITROGEN FROM SAID STORE TO PRODUCE VARYING AMOUNTS OF COLD BY VAPORIZATION OF VARYING AMOUNTS OF LIQUID NITROGEN; (F) WARMING UP AT LEAST PAT OF SAID VAPORIZED NITROGEN BY HEAT EXCHANGE WITH SAID GASEOUS FEED; (G) MIXING SAID WARMED UP GASEOUS NITROGEN, SAID WARMED UP VAPORIZED NITROGEN AND ANY NECESSARY ADDITIONAL AIR AMOUNT, TO MAKE UP SAID CONSTANT AMOUNT OF SAID GASEOUS FEED; (H) DECREASING THE ADDITIONAL AIR AMOUNT IN SAID GASEOUS FEED AS THE AMOUNT OF VAPORIZED LIQUID NITROGEN INCREASES, AND SUPPRESSING IT WHEN THE AMOUNT OF WARMED UP NITROGEN IS EQUAL TO THE AMOUNT OF GASEOUS FEED; (I) DISCHARGING ANY EXCESS AMOUNT OF WARMED UP NITROGEN WHEN SAID AMOUNT OF WARMED UP NITROGEN IS HIGHER THAN SAID CONSTANT AMOUNT OF GASEOUS FEED.
Claim 2
Independent Claim
221 words
A METHOD FOR THE PRODUCTION OF COLD BY THE VAPORIZATION OF LIQUID NITROGEN ACCORDING TO A VARIABLE COLD DEMAND, COMPRISING THE STEPS OF: (A) COOLING A CONSTANT AMOUNT OF A GASEOUS FEED AND SEPARATING FROM THE COOLED FEED A GASEOUS FRACTION CONTAINING ANY OXYGEN PRESENT IN SAID FEED, GASEOUS NITROGEN AND LIQUID NITROGEN; (B) WARMING UP BY HEAT EXCHANGE WITH SAID GASEOUS FEED SAID GASEOUS FRACTION, AND DISCHARGING IT; (C) WARMING UP BY HEAT EXCHANGE WITH SAID GASEOUS FEED SAID GASEOUS NITROGEN; (D) ESTABLISHING A STORE OF SAID SEPARATED LIQUID NITROGEN; (E) UTILIZING CONTROLLED AMOUNTS OF LIQUID NITROGEN FROM SAID STORE TO PRODUCE VARYING AMOUNTS OF COLD BY VAPORIZATION OF VARYING AMOUNTS OF LIQUID NITROGEN; (F) WARMING UP AT LEAST PAT OF SAID VAPORIZED NITROGEN BY HEAT EXCHANGE WITH SAID GASEOUS FEED; (G) MIXING SAID WARMED UP GASEOUS NITROGEN, SAID WARMED UP VAPORIZED NITROGEN AND ANY NECESSARY ADDITIONAL AIR AMOUNT, TO MAKE UP SAID CONSTANT AMOUNT OF SAID GASEOUS FEED; (H) DECREASING THE ADDITIONAL AIR AMOUNT IN SAID GASEOUS FEED AS THE AMOUNT OF VAPORIZED LIQUID NITROGEN INCREASES, AND SUPPRESSING IT WHEN THE AMOUNT OF WARMED UP NITROGEN IS EQUAL TO THE AMOUNT OF GASEOUS FEED; (I) DISCHARGING ANY EXCESS AMOUNT OF WARMED UP NITROGEN WHEN SAID AMOUNT OF WARMED UP NITROGEN IS HIGHER THAN SAID CONSTANT AMOUNT OF GASEOUS FEED.
References Cited (Backward Citations)
US3062016A
Cited
US3210950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |