US PATENT SUBCLASS 208 / 390
TAR SAND TREATMENT WITH LIQUID

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

390TAR SAND TREATMENT WITH LIQUID {1}
391  DF  .~> Inorganic (only) liquid

DEFINITION

Classification: 208/390

TAR SAND TREATMENT WITH LIQUID:

(under the class definition) Subject matter in which tar sand is contacted with a liquid material, ordinarily to dissolve or melt out the tar from the sand.