US PATENT SUBCLASS 558 / 424
.~.~.~.~ Two benzene rings bonded directly to the same oxygen, or nitrogen bonded directly to oxygen (e.g., nitro compounds, phenoxyphenyl compounds, etc.)

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
303  DF  .~ Nitriles (i.e., compounds having cyano bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {21}
411  DF  .~.~ Benzene ring bonded directly to the cyano group {6}
423  DF  .~.~.~ Oxygen attached indirectly to the cyano group by nonionic bonding {1}
424.~.~.~.~ Two benzene rings bonded directly to the same oxygen, or nitrogen bonded directly to oxygen (e.g., nitro compounds, phenoxyphenyl compounds, etc.)

DEFINITION

Classification: 558/424

Compounds under subclas 423 wherein the oxygen is bonded directly to nitrogen, or two benzene rings are bonded directly to the same oxygen.

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