US2650482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating gas mixtures
Assignee: MW Kellogg Co
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Filing: 1948-04-29
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Granted: 1953-09-01
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Expires: 1968-04-29
Abstract
No abstract record available.
Inventors
- 👤 Walter E Lobo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:49
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04763; F25J3/04769; F25J3/04854; F25J3/0486; F25J3/044; F25J3/04406; F25J3/04412; F25J3/04866; F25J3/04872; F25J3/04878; F25J3/04884; F25J2205/00; F25J2205/60; F25J2235/00; F25J2235/50; F25J2250/00; F25J2250/20; F25J2250/30; F25J2250/40; F25J2250/42; F25J2250/50; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN THE FRACTIONATION OF AIR, CONTAINING ACETYLENE AS AN IMPURITY, BY LIQUEFACTION AND RECTIFICATION AT RELATIVELY LOW TEMPERATURES, WHEREIN OXYGEN-RICH LIQUID IS CONTINUOUSLY ADDED TO A POOL IN THE BOTTOM OF A RECTIFICATION ZONE, AND CONTINUOUSLY REBOILED FROM SAID POOL, A METHOD FOR PREVENTING EXPLOSIONS WHICH COMPRISES: CONTINUALLY CIRCULATING A STREAM OF LIQUID CONTAINING DISSOLVED ACETYLENE FROM SAID POOL THROUGH A BODY OF ACETYLENE ADSORBENT MATERIAL TO REMOVE DISSOLVED ACETYLENE, AND BACK TO SAID POOL AT A RATE AT LEAST EQUIVALENT TO THE AMOUNT OF LIQUID VAPORIZED BY THE REBOILING OF SAID POOL, AND SUFFICIENT TO MAINTAIN THE ACETYLENE IN SAID POOL AT LESS THAN SATURATION, THEREBY PREVENTING THE EXISTENCE OF ACETYLENE CRYSTALS IN CONTACT WITH SAID POOL.
Claim 2
Dependent Claim
118 words
IN THE FRACTIONATION OF AIR, CONTAINING ACETYLENE AS AN IMPURITY, BY LIQUEFACTION AND RECTIFICATION AT RELATIVELY LOW TEMPERATURES, WHEREIN OXYGEN-RICH LIQUID IS CONTINUOUSLY ADDED TO A POOL IN THE BOTTOM OF A RECTIFICATION ZONE, AND CONTINUOUSLY REBOILED FROM SAID POOL, A METHOD FOR PREVENTING EXPLOSIONS WHICH COMPRISES: CONTINUALLY CIRCULATING A STREAM OF LIQUID CONTAINING DISSOLVED ACETYLENE FROM SAID POOL THROUGH A BODY OF ACETYLENE ADSORBENT MATERIAL TO REMOVE DISSOLVED ACETYLENE, AND BACK TO SAID POOL AT A RATE AT LEAST EQUIVALENT TO THE AMOUNT OF LIQUID VAPORIZED BY THE REBOILING OF SAID POOL, AND SUFFICIENT TO MAINTAIN THE ACETYLENE IN SAID POOL AT LESS THAN SATURATION, THEREBY PREVENTING THE EXISTENCE OF ACETYLENE CRYSTALS IN CONTACT WITH SAID POOL.
References Cited (Backward Citations)
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Cited
FR639702A
Cited
US1891125A
Cited
US1959884A
Cited
GB454130A
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US2500136A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |