US PATENT SUBCLASS 548 / 127
.~.~.~.~ 1,2,3-thiadiazoles (including hydrogenated)

Current as of: June, 1999
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548 /   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) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
125  DF  .~.~.~ The five-membered hetero ring consists of chalcogen, plural nitrogens, and carbon {7}
127.~.~.~.~ 1,2,3-thiadiazoles (including hydrogenated)

DEFINITION

Classification: 548/127

(under subclass 125) Compounds in which the five-membered hetero ring has sulfur in the 1-position, nitrogens in the 2- and 3-positions, and carbons in the remaining two positions.

(1) Note. This subclass provides for compounds containing the following ring which may have double bonds between its members: [figure]

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