US PATENT SUBCLASS 570 / 170
.~.~.~ Substituting halogen for a different halogen

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570 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
101  DF  .~ HALOGEN CONTAINING {21}
123  DF  .~.~ Fluorine containing {21}
170.~.~.~ Substituting halogen for a different halogen

DEFINITION

Classification: 570/170

Substituting halogen for a different halogen:

(under subclass 123) Process wherein a halogen is replaced by a different halogen.