US PATENT SUBCLASS 208 / 411
.~.~ Using solid heat carrier

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}
411.~.~ Using solid heat carrier

DEFINITION

Classification: 208/411

Employing solid heat carrier:

(under subclass 407) Subject matter in which a solid material is used to provide heat by direct contact with the feed or and intermediate in the process.

(1) Note. The solid material may be catalytic or inert, insofar as it provides direct contact heat.

(2) Note. The mere burning of a solid material is usually not sufficient for classification in this subclass unless it comes into direct contact with the feedstock to be heated.