US PATENT SUBCLASS 556 / 422
.~.~.~ Chalcogen attached directly to the nitrogen by nonionic bonding

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}
413  DF  .~.~ Nitrogen attached indirectly to silicon by nonionic bonding {7}
422.~.~.~ Chalcogen attached directly to the nitrogen by nonionic bonding

DEFINITION

Classification: 556/422

(under subclass 413) Compounds in which the nitrogen is attached directly to chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) by nonionic bonding.

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