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US3241150A
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Seismic data presentation
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US3268616A
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Process for producing 2-methyl-2-pentene
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US3239996A
|
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Method of separating helium from other constituents of natural gas
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US3246960A
|
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Catalytic conversion apparatus
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US3282891A
|
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Polypropylene stabilized with a combination of glycerol and phenols
|
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US2896932A
|
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Apparatus for hot water sulfur mining
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US3041274A
|
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Heating of water and mining of sulphur therewith
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US2896931A
|
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Mining of sulfur by liquefaction of the sulfur
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US2947578A
|
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Procedure for transporting sulphur
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US2917345A
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Process of producing sulfur slurry for transportation thereof
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US2808248A
|
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Mining of sulfur using spaced-apart wells
|
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US2808247A
|
|
Mining of sulfur by liquefaction of the sulfur
|
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US2747751A
|
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Apparatus for handling pipe in a derrick
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US2159082A
|
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Apparatus for making gravity measurements
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GB304926A
|
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Improvements in or relating to the recovery of oils and naphthenic acids from still residues obtained in the purification of mineral oils
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US1812497A
|
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Recovery of potassium sulphate from polyhalite
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US1735484A
|
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Loading tank cars and the like
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US1684679A
|
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Power-transmitting apparatus
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US1599825A
|
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Art of distilling easily-decomposable materials
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US1599824A
|
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Apparatus for distilling decomposable materials
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