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3879282
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Patent number 3,879,282
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Issue date Apr 22, 1975
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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3578581
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Patent number 3,578,581
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Issue date May 11, 1971
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C07 - ORGANIC CHEMISTRY
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3442797
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Patent number 3,442,797
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Issue date May 6, 1969
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2115781
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Patent number 2,115,781
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Issue date May 3, 1938
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...