US PATENT SUBCLASS 203 / 9
.~.~ Of unsaturated hydrocarbon

Current as of: June, 1999
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203 /   HD   DISTILLATION: PROCESSES, SEPARATORY

6  DF  ADDITION OF MATERIAL TO DISTILLAND TO INHIBIT OR PREVENT REACTION OR TO STABILIZE {2}
8  DF  .~ For inhibiting or preventing a polymerization reaction {1}
9.~.~ Of unsaturated hydrocarbon

DEFINITION

Classification: 203/9

(under subclass 8) Processes directed to inhibiting or preventing the polymerization of an unsaturated hydrocarbon.