US PATENT SUBCLASS 504 / 217
.~.~.~.~.~ Plural ring nitrogens and a single ring chalcogen in the hetero ring (e.g., 1,3,4-thiadiazoles, etc.)

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504 /   HD   PLANT PROTECTING AND REGULATING COMPOSITIONS

116  DF  PLANT GROWTH REGULATING COMPOSITIONS (E.G., HERBICIDES, ETC.) {9}
189  DF  .~ Organic active compound containing {19}
209  DF  .~.~ Hetero ring containing {11}
210  DF  .~.~.~ Acyclic urea or thiourea bonded directly to ring carbon of the hetero ring (i.e., HNH-C(=X)-NH-, wherein X is sulfur or oxygen and substitution may be made for hydrogen only) {2}
216  DF  .~.~.~.~ The hetero ring is five-membered including nitrogen {1}
217.~.~.~.~.~ Plural ring nitrogens and a single ring chalcogen in the hetero ring (e.g., 1,3,4-thiadiazoles, etc.)

DEFINITION

Classification: 504/217

Plural ring nitrogens and a single ring chalcogen in the hetero ring (e.g., 1, 3, 4-thiadiazoles, etc.):

(under subclass 216) Compositions wherein the five-membered hetero ring has at least two ring nitrogens and only one ring chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) as ring members.

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