Patent US2555060A successfully refreshed from Google Patents.
US2555060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precooling and purification of gaseous mixtures prior to liquefaction
Assignee: BOC Group Ltd
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Filing: 1947-05-14
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Granted: 1951-05-29
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Expires: 1967-05-14
Abstract
No abstract record available.
Inventors
- 👤 Schuftan Paul Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:37
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/08; F25J2210/00; F25J2210/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF PRECOOLING AIR CONTAINING WATER VAPOUR AS A PRELIMINARY TO LIQUEFYING AT LEAST PART OF THE AIR AND SEPARATING THEREFROM A NITROGEN FRACTION, SAID METHOD COMPRISING BRINGING THE AIR INTO DIRECT CONTACT AND IN COUNTER-CURRENT FLOW WITH A GLYCOL-WATER SOLUTION AT A TEMPERATURE BELOW 0* C. ADAPTED TO COOL THE AIR AND TO RETAIN SUCH A PROPORTION OF THE WATER CONTENT THAT THE PARTIAL VAPOUR PRESSURE OF ANY RESIDUAL WATER IN THE COOLED AIR IS SO LOW AS TO ENSURE EXTENDED OPERATION OF THE PLANT IN WHICH THE SEQUENT LIQUEFACTION IS EFFECTED, AND RESTORING THE GLYCOL-WATER SOLUTION TO A CONDITION SUITABLE FOR RE-USE BY A REGENERATION PROCESS WHICH COMPRISES BRINGING IT INTO DIRECT CONTACT WITH A GASEOUS COOLANT DERIVED FROM THE SEQUENT LIQUEFAC-
Claim 2
Independent Claim
125 words
THE METHOD OF PRECOOLING AIR CONTAINING WATER VAPOUR AS A PRELIMINARY TO LIQUEFYING AT LEAST PART OF THE AIR AND SEPARATING THEREFROM A NITROGEN FRACTION, SAID METHOD COMPRISING BRINGING THE AIR INTO DIRECT CONTACT AND IN COUNTER-CURRENT FLOW WITH A GLYCOL-WATER SOLUTION AT A TEMPERATURE BELOW 0* C. ADAPTED TO COOL THE AIR AND TO RETAIN SUCH A PROPORTION OF THE WATER CONTENT THAT THE PARTIAL VAPOUR PRESSURE OF ANY RESIDUAL WATER IN THE COOLED AIR IS SO LOW AS TO ENSURE EXTENDED OPERATION OF THE PLANT IN WHICH THE SEQUENT LIQUEFACTION IS EFFECTED, AND RESTORING THE GLYCOL-WATER SOLUTION TO A CONDITION SUITABLE FOR RE-USE BY A REGENERATION PROCESS WHICH COMPRISES BRINGING IT INTO DIRECT CONTACT WITH A GASEOUS COOLANT DERIVED FROM THE SEQUENT LIQUEFAC-
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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) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |