US PATENT SUBCLASS 208 / 409
.~.~ Vertical gas upflow, e.g., fluidization, etc.

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}
407  DF  .~ Specified agitation or circulation in gas contact zone {3}
409.~.~ Vertical gas upflow, e.g., fluidization, etc. {1}
410  DF  .~.~.~> Using solid heat carrier

DEFINITION

Classification: 208/409

Vertical gas upflow, e.g., fluidization, etc.:

(under subclass 407) Subject matter in which the gas moves vertically upward in the contact zone.

(1) Note. The movement of solid or liquid may be concurrent with or countercurrent to the movement of the gas.

(2) Note. A mere statement in a claim that fluidization occurs is sufficient for placement in this subclass.