US PATENT SUBCLASS 556 / 421
.~.~.~.~.~ Additional nitrogen bonded directly to the -C(=X)- group

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}
418  DF  .~.~.~ Having -C(=X)-, wherein X is chalcogen, attached indirectly to silicon by nonionic bonding {1}
419  DF  .~.~.~.~ Nitrogen is bonded directly to the -C(=X)- group {2}
421.~.~.~.~.~ Additional nitrogen bonded directly to the -C(=X)- group

DEFINITION

Classification: 556/421

(under subclass 419) Compounds in which the group is bonded directly to an additional nitrogen.

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