US PATENT SUBCLASS 570 / 260
.~.~ Preparing by halogen exchange

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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}
260.~.~ Preparing by halogen exchange

DEFINITION

Classification: 570/260

Preparing by halogen exchange:

(under subclass 101) Process wherein a halogen atom in a compound is replaced with a different halogen.