US1873137A
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Bubbler cap construction
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US1906470A
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Apparatus for making gas
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US1873135A
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Process and apparatus for the fractional distillation of oil
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US1858158A
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Gas and liquid contact apparatus
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US1900862A
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Process for refining oils
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US1769698A
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Process for recovering natural gasoline
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US1940955A
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Process and apparatus for refining mineral oils
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US1833717A
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Purification and concentration of liquids
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US1873136A
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Process for preventing corrosion in oil refining equipment
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US1713256A
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Apparatus for distilling liquid mixtures
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US1926009A
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Method and apparatus for treating oils
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US1894355A
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Method and apparatus for treating oils
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US1842181A
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Apparatus for and method of distillation
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US1842180A
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Process and apparatus for distillation
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US1828148A
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Process for producing fuel gas and carbonized coal
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US1672978A
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Distillation of liquid mixtures
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US1713255A
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Method of and apparatus for distilling and fractionating oil
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US1898246A
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Apparatus for distilling oils
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US1662105A
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Process and apparatus for distilling oil
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US1713254A
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Process for distilling liquid mixtures
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