US PATENT SUBCLASS 556 / 409
.~.~.~ Plural silicons in the ring

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}
407  DF  .~.~ Nitrogen is ring member {2}
409.~.~.~ Plural silicons in the ring

DEFINITION

Classification: 556/409

(under subclass 407) Compounds in which the ring additionally contains at least two silicons as ring members.

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