US PATENT SUBCLASS 556 / 418
.~.~.~ Having -C(=X)-, wherein X is chalcogen, attached indirectly to silicon 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}
418.~.~.~ 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}

DEFINITION

Classification: 556/418

(under subclass 413) Compounds in which a group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is attached indirectly to silicon by nonionic bonding.

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