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US2546252A
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Method of plugging wells
|
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US2426848A
|
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Cracking hydrocarbons in the presence of granular coke
|
|
US2357621A
|
|
Apparatus for coking petroleum residues
|
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US2323501A
|
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Method of distilling petroleum residues or the like
|
|
US2364492A
|
|
Method of coking and cracking petroleum residues or the like
|
|
US2348699A
|
|
Method of cracking hydrocarbon vapors
|
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US2314112A
|
|
Method of coking petroleum residues or the like
|
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US2274223A
|
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Method of separating wax from oils
|
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GB460902A
|
|
Improvements in or relating to the refining of mineral oil stocks
|
|
US2149323A
|
|
Solvent and process of treating mineral oils
|
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US2077287A
|
|
Joint production of plurality of good oil fractions from mineral oil
|
|
GB445942A
|
|
Improvements in or relating to the extraction of mineral oils
|
|
US2070385A
|
|
Purification of oil fraction and solvent recovery
|
|
GB443545A
|
|
Improvements in or relating to the separation of a mineral oil into fractions
|
|
US2041308A
|
|
Refining mineral oil
|
|
US2070384A
|
|
Refining of mineral oils
|
|
US2083511A
|
|
Refining mineral oil
|
|
US2149322A
|
|
Oil treating process
|
|
US2070383A
|
|
Lubricant
|
|
GB424000A
|
|
Improvements in or relating to the refining of mineral oil and the preparation of lubricating oil
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