US PATENT SUBCLASS 544 / 51
.~.~.~.~.~.~.~ 1,4-benzothiazines


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}
47  DF  .~.~.~.~.~ Bicyclo ring system having the six-membered hetero ring as one of the cyclos {2}
49  DF  .~.~.~.~.~.~ Benzothiazines (including hydrogenated) {2}
51.~.~.~.~.~.~.~ 1,4-benzothiazines {1}
52  DF  .~.~.~.~.~.~.~>.~ Double bonded divalent chalcogen containing


DEFINITION

Classification: 544/51

(under subclass 49) Compounds wherein the sulfur and nitrogen atoms of the benzothiazine ring system are in para-position to each other.

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