US PATENT SUBCLASS 568 / 23
.~.~.~.~ Sulfur or oxygen bonded directly to a ring

Current as of: June, 1999
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568 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {4}
18  DF  .~ SULFUR CONTAINING {9}
21  DF  .~.~ Sulfur bonded directly to sulfur (e.g., disulfides, etc.) {4}
22  DF  .~.~.~ Oxygen containing {1}
23.~.~.~.~ Sulfur or oxygen bonded directly to a ring

DEFINITION

Classification: 568/23

(under subclass 22) Compounds wherein sulfur or oxygen is

bonded directly to a ring.