Patent US3224207A successfully refreshed from Google Patents.
US3224207A
Expired / Lapsed
US
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Liquefaction of gases
Assignee: Conch International Methane Ltd
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Filing: 1962-02-12
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Granted: 1965-12-21
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Expires: 1982-02-12
Abstract
No abstract record available.
Inventors
- 👤 Eli M Feist
- 👤 Hashemi-Tafreshi Hadi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:07
CPC Classifications
F; F25; F25J; F25J1/00; F25J1/0002; F25J1/0022; F25J1/003; F25J1/0047; F25J1/0052; F25J1/006; F25J1/008; F25J1/0085; F25J1/0087; F25J1/0097; F25J1/02; F25J1/0203; F25J1/0205; F25J1/0221; F25J1/0243; F25J1/0257; F25J1/0262; F25J1/0264; F25J2210/00; F25J2210/06; F25J2210/42; F25J2240/00; F25J2240/02; F25J2240/12; F25J2270/00; F25J2270/14; F25J2270/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD FOR THE LIQUEFACTION OF MACHINE AND SUBSEQUENT COOLING OF THE LIQUEFIED METHANE, WHICH COMPRISES REMOVING SENSIBLE HEAT FROM THE GASEOUS METHANE AND LIQUEFIED METHANE BY INDIRECT HEAT EXCHANGE WITH A NITROGEN EXPANSION REFRIGERATION SYSTEM AND REMOVING LATENT HEAT FROM THE METHANE BY INDIRECT HEAT EXCHANGE WITH A CASCADE VAPOUR-COMPRESSION REFRIGERATION CYCLE, IN WHICH ETHANE, PROPANE AND WATER ARE USED AS REFRIGERANTS IN THE CASCADE VAPOUR-COMPRESSION REFRIGERATION CYCLE.
Claim 2
Independent Claim
69 words
A METHOD FOR THE LIQUEFACTION OF MACHINE AND SUBSEQUENT COOLING OF THE LIQUEFIED METHANE, WHICH COMPRISES REMOVING SENSIBLE HEAT FROM THE GASEOUS METHANE AND LIQUEFIED METHANE BY INDIRECT HEAT EXCHANGE WITH A NITROGEN EXPANSION REFRIGERATION SYSTEM AND REMOVING LATENT HEAT FROM THE METHANE BY INDIRECT HEAT EXCHANGE WITH A CASCADE VAPOUR-COMPRESSION REFRIGERATION CYCLE, IN WHICH ETHANE, PROPANE AND WATER ARE USED AS REFRIGERANTS IN THE CASCADE VAPOUR-COMPRESSION REFRIGERATION CYCLE.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |