US2946199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid oxygen
Assignee: Arthur D Little Inc
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Filing: 1958-08-26
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Granted: 1960-07-26
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Expires: 1978-08-26
Abstract
No abstract record available.
Inventors
- 👤 Samuel C Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:25
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/044; F25J3/04248; F25J3/04284; F25J3/0429; F25J3/04296; F25J3/04763; F25J3/04866; F25J3/04975; F25J3/04987; F25J5/00; F25J5/002; F25J2200/00; F25J2200/70; F25J2205/00; F25J2205/24; F25J2215/00; F25J2215/50; F25J2290/00; F25J2290/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR THE LIQUEFACTION AND RECTIFICATION OF AIR YIELDING LIQUID OXYGEN AND WASTE NITROGEN GAS, WHICH COMPRISES THE SIMULTANEOUS STEPS OF PASSING A STREAM OF COMPRESSED AIR AT A PRESSURE IN THE RANGE OF 60 TO 175 P.S.I. THROUGH A FIRST PATH IN A HEAT EXCHANGE ZONE CONTAINING NOT MORE THAN THREE THERMALLY BONDED PATHS IN HEAT EXCHANGE RELATION WITH EACH OTHER ALONG SUBSTANTIALLY THE ENTIRE LENGTH THEREOF, FLOWING A STREAM OF WASTE NITROGEN GAS DERIVED FROM SAID AIR STREAM THROUGH A SECOND PATH OF SAID HEAT EXCHANGE ZONE IN COUNTERCURRENT RELATION TO SAID AIR STREAM, THEREBY CHILLING SAID AIR STREAM AND EFFECTING DEPOSITION OF MOISTURE AND CARBON DIOXIDE SUBSTANTIALLY COMPLETELY FROM SAID AIR STREAM IN SAID FIRST
Claim 2
Dependent Claim
119 words
A PROCESS FOR THE LIQUEFACTION AND RECTIFICATION OF AIR YIELDING LIQUID OXYGEN AND WASTE NITROGEN GAS, WHICH COMPRISES THE SIMULTANEOUS STEPS OF PASSING A STREAM OF COMPRESSED AIR AT A PRESSURE IN THE RANGE OF 60 TO 175 P.S.I. THROUGH A FIRST PATH IN A HEAT EXCHANGE ZONE CONTAINING NOT MORE THAN THREE THERMALLY BONDED PATHS IN HEAT EXCHANGE RELATION WITH EACH OTHER ALONG SUBSTANTIALLY THE ENTIRE LENGTH THEREOF, FLOWING A STREAM OF WASTE NITROGEN GAS DERIVED FROM SAID AIR STREAM THROUGH A SECOND PATH OF SAID HEAT EXCHANGE ZONE IN COUNTERCURRENT RELATION TO SAID AIR STREAM, THEREBY CHILLING SAID AIR STREAM AND EFFECTING DEPOSITION OF MOISTURE AND CARBON DIOXIDE SUBSTANTIALLY COMPLETELY FROM SAID AIR STREAM IN SAID FIRST
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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |