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Production of high purity argon
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Patent number 4,983,194
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Issue date Jan 8, 1991
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Air Products and Chemicals, Inc.
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Jeffrey A. Hopkins
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Recycle liquefier process
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Patent number 4,894,076
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Issue date Jan 16, 1990
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Air Products and Chemicals, Inc.
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Thaddeus N. Dobracki
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Ultra pure liquid oxygen cycle
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Patent number 4,869,741
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Issue date Sep 26, 1989
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Air Products and Chemicals, Inc.
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Roger M. McGuinness
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...