US PATENT SUBCLASS 558 / 445
.~.~.~.~ Nitrogen bonded directly to the carbonyl (e.g., ureas, etc.)

Current as of: June, 1999
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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
303  DF  .~ Nitriles (i.e., compounds having cyano bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {21}
435  DF  .~.~ Acyclic (e.g., purification of saturated nitriles, etc.) {9}
440  DF  .~.~.~ Carbonyl attached indirectly to the cyano group by nonionic bonding (e.g., aldehydes, ketones, etc.) {2}
445.~.~.~.~ Nitrogen bonded directly to the carbonyl (e.g., ureas, etc.)

DEFINITION

Classification: 558/445

(under subclass 440) Compounds wherein the carbonyl is bonded directly to nitrogen.

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