US PATENT SUBCLASS 556 / 402
.~.~ Boron 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}
402.~.~ Boron containing {1}
403  DF  .~.~.~> Boron is ring member

DEFINITION

Classification: 556/402

(under subclass 400) Compounds which contain boron.