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Process and apparatus for producing nitrogen
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Patent number 4,767,606
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Issue date Aug 30, 1988
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United Technologies Corporation
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John C. Trocciola
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Partial oxidation process
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Patent number 4,184,322
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Issue date Jan 22, 1980
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Texaco Inc.
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Peter L. Paull
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2865864
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Patent number 2,865,864
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Issue date Dec 23, 1958
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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2079019
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Patent number 2,079,019
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Issue date May 4, 1937
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C21 - METALLURGY OF IRON