US PATENT SUBCLASS 544 / 188
.~.~.~.~.~ Polycyclo ring system having the anthrone or anthraquinone and at least one hetero ring as cyclos

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

Internet Version by PATENTEC © 1999      Terms of Use


544 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {1}
1  DF  .~.~ Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
180  DF  .~.~.~ Triazines {11}
187  DF  .~.~.~.~ Anthrone or anthraquinone containing {2}
188.~.~.~.~.~ Polycyclo ring system having the anthrone or anthraquinone and at least one hetero ring as cyclos

DEFINITION

Classification: 544/188

(under subclass 187) Compounds wherein anthrone or anthraquinone is part of a polycyclo ring system which contains at least one hetero ring.

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