US PATENT SUBCLASS 585 / 651
.~.~.~ Using catalyst

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

500  DF  UNSATURATED COMPOUND SYNTHESIS {14}
648  DF  .~ By C content reduction, e.g., cracking, etc. {3}
650  DF  .~.~ Ethylene product per se {2}
651.~.~.~ Using catalyst

DEFINITION

Classification: 585/651

Using catalyst:

(under subclass 650) Subject matter wherein the process employs a catalyst.