US PATENT SUBCLASS 208 / 432
.~.~ With specified circulation procedure in contact zone

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

400  DF  BY TREATMENT OF SOLID MINERAL, E.G., COAL LIQUEFACTION, ETC. {13}
428  DF  .~ Including contact with extraneous additive other than hydrogen, e.g., solvent, etc. {7}
432.~.~ With specified circulation procedure in contact zone

DEFINITION

Classification: 208/432

With specified circulation procedure in contact zone:

(under subclass 428) Subject matter wherein a specified agitation or circulation pattern, maintained by a fluid within a single contact zone, is claimed, or in which the location of streams associated with the contact zone are defined to establish a specific circulation pattern, e.g., use of a rotating kiln, etc.