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US1510045A
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Method of firing retort furnaces
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US1447297A
|
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Process for the combined solvent and destructive distillation treatment of oil containing earthy material
|
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US1513746A
|
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Fuel and process of preparing the same
|
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US1513745A
|
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Process of preparing mineral wax
|
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US1447296A
|
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Apparatus for the combined solvent and destructive distillation treatment of shale
|
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US1411237A
|
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Process for treating hydrocarbon oils
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US1467758A
|
|
Process of producing hydrocarbon materials
|
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US1467757A
|
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Process and apparatus for the extraction of hydrocarbon oils from shale
|
|
US1422038A
|
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Treatment of hydrocarbon oils
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CA188464A
|
|
Hydro-carbon extraction
|
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US1373391A
|
|
Treating hydrocarbon oils
|
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CA185181A
|
|
Hydro-carbon extraction
|
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US1365894A
|
|
Process of purifying oils
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US1342741A
|
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Process for extracting oils and hydrocarbon material from shale and similar bituminous rocks
|
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US1221698A
|
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Process of treating mineral oils for increasing the yield of light-gravity oils.
|
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US1004632A
|
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Apparatus for treating hydrocarbon oils.
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US967337A
|
|
Process for treating asphaltum to make varnish.
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US826089A
|
|
Process of refining and purifying hydrocarbon oils.
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US897356A
|
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Method of drying air for blast-furnaces.
|
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CA230622A
|
|
Distillation of oil
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