US PATENT SUBCLASS 540 / 610
.~.~.~.~ The chalcogen or nitrogen is multiple bonded to a carbon (e.g., cyano or carbonyl groups, etc.)


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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
484  DF  .~.~ The hetero ring contains seven members including nitrogen and carbon {14}
609  DF  .~.~.~ Chalcogen or nitrogen attached indirectly to the hetero ring by acyclic nonionic bonding {1}
610.~.~.~.~ The chalcogen or nitrogen is multiple bonded to a carbon (e.g., cyano or carbonyl groups, etc.)


DEFINITION

Classification: 540/610

(under subclass 609) Compounds in which the chalcogen or nitrogen is attached directly to carbon by a multiple bond (i.e., double or triple bond).

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