US PATENT SUBCLASS 568 / 64
.~.~.~.~.~ 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}
61  DF  .~.~ Thiol or mercaptide containing (i.e., -SH or -SM containing where M is a Group IA or IIA light metal) {5}
62  DF  .~.~.~ Oxygen containing {1}
63  DF  .~.~.~.~ Carbonyl containing (e.g., ketone containing, etc.) {1}
64.~.~.~.~.~ Oxygen bonded directly to a ring

DEFINITION

Classification: 568/64

(under subclass 62) Compounds wherein oxygen is directly bonded to a ring.