US PATENT SUBCLASS 556 / 461
.~.~.~.~ Benzene ring containing

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {3}
400  DF  .~ SILICON CONTAINING {19}
450  DF  .~.~ Two silicons bonded directly to the same oxygen {7}
460  DF  .~.~.~ Ring consisting of silicon and oxygen {1}
461.~.~.~.~ Benzene ring containing

DEFINITION

Classification: 556/461

(under subclass 460) Compounds which contain a benzene ring.

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