US PATENT SUBCLASS 556 / 428
.~.~.~ Chalcogen bonded directly to sulfur

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}
427  DF  .~.~ Sulfur attached indirectly to silicon by nonionic bonding {2}
428.~.~.~ Chalcogen bonded directly to sulfur

DEFINITION

Classification: 556/428

(under subclass 427) Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is bonded directly to sulfur.

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