US PATENT SUBCLASS 544 / 31
.~.~.~.~.~ Phenothiazine as three cyclos of polycyclo ring system having at least four cyclos

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}
3  DF  .~.~.~ Six-membered hetero ring consists of oxygen, sulfur, nitrogen and carbon (e.g., oxathiazines, etc.) {7}
14  DF  .~.~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {3}
31.~.~.~.~.~ Phenothiazine as three cyclos of polycyclo ring system having at least four cyclos

DEFINITION

Classification: 544/31

(under subclass 14) Compounds wherein the polycyclo ring system contains four or more rings of which three form the phenothiazine structure.

(1) Note. This subclass provides for compounds such as the structures below, etc.: [figure] [figure]