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Production of oxygen-lean argon from air
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Patent number 4,994,098
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Issue date Feb 19, 1991
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Air Products and Chemicals, Inc.
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Rakesh Agrawal
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Process for recovering argon
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Patent number 4,575,388
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Issue date Mar 11, 1986
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Nihon Sanso Kabushiki Kaisha
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Hidetake Okada
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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3222878
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Patent number 3,222,878
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Issue date Dec 14, 1965
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2728205
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Patent number 2,728,205
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Issue date Dec 27, 1955
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2608070
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Patent number 2,608,070
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Issue date Aug 26, 1952
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...