US PATENT SUBCLASS 585 / 615
.~.~.~ Butadiene product per se

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

500  DF  UNSATURATED COMPOUND SYNTHESIS {14}
601  DF  .~ Diolefin product {4}
613  DF  .~.~ By C content reduction, e.g., cracking, etc. {2}
615.~.~.~ Butadiene product per se

DEFINITION

Classification: 585/615

Butadiene product, per se:

(under subclass 613) Subject matter wherein the product recovered is butadiene, i.e., H2 C=CH-CH=CH2.