US PATENT SUBCLASS 208 / 418
.~.~ Including contact with hydrogen gas

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}
415  DF  .~ Including contact of feed with liquid produced in the process, i.e., recycle {3}
418.~.~ Including contact with hydrogen gas

DEFINITION

Classification: 208/418

Including contact with hydrogen gas:

(under subclass 415) Subject matter wherein hydrogen gas, pure or in admixture with other gases is present in the reactor during or after the contaction with the recycle stream.