US PATENT SUBCLASS 534 / 626
.~.~.~.~.~.~ Chalcogen or carbon bonded directly to the six-membered hetero ring and is between the hetero ring and the azo group


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

*  DD  ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8}
573  DF  .~ Azo {51}
617  DF  .~.~ Fiber- or substrate-reactive azo compound {5}
619  DF  .~.~.~ Heavy metal or aluminum containing {2}
620  DF  .~.~.~.~ Halogen attached directly to a hetero ring or to an alicyclic ring by nonionic bonding {2}
622  DF  .~.~.~.~.~ The hetero ring is six-membered and contains at least two nitrogens {6}
626.~.~.~.~.~.~ Chalcogen or carbon bonded directly to the six-membered hetero ring and is between the hetero ring and the azo group


DEFINITION

Classification: 534/626

(under subclass 622) Compounds in which carbon or chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the six-membered hetero ring, which chalcogen or carbon is between the hetero ring and the azo group.

(1) Note. An example of a compound provided for herein is: [figure]