US PATENT SUBCLASS 548 / 135
.~.~.~.~.~ Chalcogen or nitrogen attached directly to ring carbon of the thiadiazole ring by nonionic bonding

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}
134  DF  .~.~.~.~ 1,2,5-thiadiazoles (including hydrogenated) {1}
135.~.~.~.~.~ Chalcogen or nitrogen attached directly to ring carbon of the thiadiazole ring by nonionic bonding

DEFINITION

Classification: 548/135

(under subclass 134) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen is attached directly to ring carbon of the thiadiazole ring by nonionic bonding.