US PATENT SUBCLASS 556 / 405
.~.~.~ Chalcogen bonded directly to silicon

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}
404  DF  .~.~ Phosphorus attached directly or indirectly to silicon by nonionic bonding {1}
405.~.~.~ Chalcogen bonded directly to silicon

DEFINITION

Classification: 556/405

(under subclass 404) Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to silicon.

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