US PATENT SUBCLASS 208 / 413
.~.~ Solid catalyst in at least one step

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}
412  DF  .~ Plural hydrogenation steps {1}
413.~.~ Solid catalyst in at least one step

DEFINITION

Classification: 208/413

Solid catalyst in at least one step:

(under subclass 412) Subject matter in which the claimed hydrogenation conditions of at least one step include the presence of a solid material disclosed as being a catalyst.