Patent US4638495A successfully refreshed from Google Patents.
Patent US2900796A successfully refreshed from Google Patents.
US2900796A
Expired / Lapsed
US
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Method of liquefying natural gas
Assignee: Constock Liquid Methane Corp
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Filing: 1954-08-16
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Granted: 1959-08-25
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Expires: 1974-08-16
Abstract
No abstract record available.
Inventors
- 👤 Willard L Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:40
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/0002; F25J1/0022; F25J1/003; F25J1/0032; F25J1/0035; F25J1/0042; F25J1/02; F25J1/0201; F25J1/0202; F25J1/0228; F25J1/0232; F25J1/0243; F25J1/0279; F25J1/0281; F25J1/0282; F25J2220/00; F25J2220/60; F25J2220/62; F25J2230/00; F25J2230/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE METHOD OF CONTROLLING AND LIMITED THE NITROGEN CONCENTRATION IN A RECYCLING SYSTEM, WHICH LIQUEFIES A COMBUSTIBLE GAS, WHICH MAY CONTAIN NITROGEN, BY CAUSING THE GAS TO EXPAND AND TO DO EXTERNAL WORK WITH RESULTANT LIQUEFRACTION OF PART OF THE GAS, SEPARATING THE LIQUID FROM THE UNLIQUEFIED DRY GAS AND DISCHARGING THE LIQUID FROM THE SYSTEM, COMPRESSING DRY GAS TO A PRESSURE ABOVE THAT AT WHICH SEPARATION FROM THE LIQUID TOOK PLACE AND DISCHARGING SOME OF IT FROM THE SYSTEM, COMPRESSING THE REMAINING DRY GAS AND RECYCLING IT THROUGH THE SYSTEM, TO GETHER WITH FRESH GAS ADDED IN SUCH QUANTITY AS TO COMPENSATE FOR THE LIQUEFIED AND DRY GAS DISCHARGED FROM THE SYSTEM.
Claim 2
Independent Claim
113 words
THE METHOD OF CONTROLLING AND LIMITED THE NITROGEN CONCENTRATION IN A RECYCLING SYSTEM, WHICH LIQUEFIES A COMBUSTIBLE GAS, WHICH MAY CONTAIN NITROGEN, BY CAUSING THE GAS TO EXPAND AND TO DO EXTERNAL WORK WITH RESULTANT LIQUEFRACTION OF PART OF THE GAS, SEPARATING THE LIQUID FROM THE UNLIQUEFIED DRY GAS AND DISCHARGING THE LIQUID FROM THE SYSTEM, COMPRESSING DRY GAS TO A PRESSURE ABOVE THAT AT WHICH SEPARATION FROM THE LIQUID TOOK PLACE AND DISCHARGING SOME OF IT FROM THE SYSTEM, COMPRESSING THE REMAINING DRY GAS AND RECYCLING IT THROUGH THE SYSTEM, TO GETHER WITH FRESH GAS ADDED IN SUCH QUANTITY AS TO COMPENSATE FOR THE LIQUEFIED AND DRY GAS DISCHARGED FROM THE SYSTEM.
References Cited (Backward Citations)
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |