US PATENT SUBCLASS 544 / 187
.~.~.~.~ Anthrone or anthraquinone containing

Current as of: June, 1999
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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.~.~.~.~ Anthrone or anthraquinone containing {2}
188  DF  .~.~.~.~.~> Polycyclo ring system having the anthrone or anthraquinone and at least one hetero ring as cyclos
189  DF  .~.~.~.~.~> Sulfur containing

DEFINITION

Classification: 544/187

(under subclass 180) Compounds which contain anthrone or anthraquinone.

(1) Note. The anthrone or anthraquinone ring system may be three cyclos of a polycyclo ring system having more than three cyclos.

(2) Note. Two examples of compounds provided for herein are: [figure] [figure]