US PATENT SUBCLASS 540 / 609
.~.~.~ Chalcogen or nitrogen attached indirectly to the hetero ring by acyclic nonionic bonding

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~ Chalcogen or nitrogen attached indirectly to the hetero ring by acyclic nonionic bonding {1}
610  DF  .~.~.~.~> The chalcogen or nitrogen is multiple bonded to a carbon (e.g., cyano or carbonyl groups, etc.)

DEFINITION

Classification: 540/609

(under subclass 484) Compounds wherein nitrogen or chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is attached indirectly to the hetero ring by acyclic nonionic bonding.

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