US PATENT SUBCLASS 534 / 655
.~.~.~.~ Hetero ring containing


Current as of: June, 1999
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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}
653  DF  .~.~ Polycyclo carbocyclic ring system having at least three cyclos {3}
654  DF  .~.~.~ The polycyclo ring system consists of three six-membered cyclos and has plural oxygens bonded directly thereto {2}
655.~.~.~.~ Hetero ring containing


DEFINITION

Classification: 534/655

(under subclass 654) Compounds which contain a hetero ring.

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