US PATENT SUBCLASS 504 / 235
.~.~.~ Hetero ring is six-membered consisting of two nitrogens and four carbons (e.g., 1,4-diazines, 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}
235.~.~.~ Hetero ring is six-membered consisting of two nitrogens and four carbons (e.g., 1,4-diazines, etc.) {2}
236  DF  .~.~.~.~> 1,2-diazines (including hydrogenated) {2}
239  DF  .~.~.~.~> 1,3-diazines (including hydrogenated) {2}

DEFINITION

Classification: 504/235

Hetero ring is six-membered consisting of two nitrogens and four carbons (e.g., 1, 4-diazines, etc.):

(under subclass 209) Compositions which contain a six-membered hetero ring consisting of two ring nitrogens and four ring carbons.

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