US PATENT SUBCLASS 585 / 650
.~.~ Ethylene product per se

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.~.~ Ethylene product per se {2}
651  DF  .~.~.~> Using catalyst
652  DF  .~.~.~> Using O (partial combustion) or steam

DEFINITION

Classification: 585/650

Ethylene product, per se:

(under subclass 648) Subject matter wherein ethylene is produced.

(1) Note. The expression, "per se", is meant to include product mixtures which contain ethylene as a desired product and to exclude derivatives of ethylene.