US PATENT SUBCLASS 556 / 424
.~.~.~ Plural nitrogens bonded directly to the same carbon or attached by a chain consisting of carbons, which carbons may be part of a ring

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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}
424.~.~.~ Plural nitrogens bonded directly to the same carbon or attached by a chain consisting of carbons, which carbons may be part of a ring

DEFINITION

Classification: 556/424

(under subclass 413) Compounds in which at least two nitrogens are bonded directly to the same carbon or are attached to each other by a chain consisting of carbons, which carbons may be part of a ring.

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