US PATENT SUBCLASS 534 / 771
.~.~.~.~.~ Acyclic oxygen bonded directly to the hetero ring


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}
751  DF  .~.~ Hetero ring containing {5}
753  DF  .~.~.~ Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos {11}
770  DF  .~.~.~.~ The hetero ring is six-membered and consists of one nitrogen and five carbons (e.g., pyridine, etc.) {2}
771.~.~.~.~.~ Acyclic oxygen bonded directly to the hetero ring {1}
772  DF  .~.~.~.~.~.~> Plural acyclic chalcogens bonded directly to the hetero ring at the two positions adjacent to the ring nitrogen


DEFINITION

Classification: 534/771

(under subclass 770) Compounds in which acyclic oxygen is bonded directly to the hetero ring.

(1) Note. Examples of compounds provided for herein are:

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