US PATENT SUBCLASS 544 / 37
.~.~.~.~.~.~.~ Nitrogen bonded directly to phenothiazine ring system

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}
32  DF  .~.~.~.~.~ Tricyclo ring system having the six-membered hetero ring as one of the cyclos {3}
35  DF  .~.~.~.~.~.~ Phenothiazines (including hydrogenated) {3}
37.~.~.~.~.~.~.~ Nitrogen bonded directly to phenothiazine ring system

DEFINITION

Classification: 544/37

(under subclass 35) Compounds which include nitrogen bonded directly to the phenothiazine ring system.

(1) Note. This subclass provides largely for phenothiazine dyes which have one or more substituted amino groups on the benzo moiety, such as leuco methylene blue, [figure]

(2) Note. This subclass also provides for any nitrogen containing substituent wherein the nitrogen atom is bonded directly to the benzo rings; e.g., the structure below. [figure]