US PATENT SUBCLASS 504 / 227
.~.~.~ Hetero ring is six-membered consisting of three nitrogens and three carbons

Current as of: June, 1999
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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}
227.~.~.~ Hetero ring is six-membered consisting of three nitrogens and three carbons {4}
228  DF  .~.~.~.~> Polycyclo ring system having the six-membered hetero ring as one of the cyclos
229  DF  .~.~.~.~> Asymmetrical (e.g., 1,2,4-triazines, etc.)
230  DF  .~.~.~.~> Additional hetero ring containing
231  DF  .~.~.~.~> Nitrogen bonded directly to ring carbon of the six-membered hetero ring {1}

DEFINITION

Classification: 504/227

Hetero ring is six-membered consisting of three nitrogens and three carbons:

(under subclass 209) Compositions which contain a hetero ring consisting of three ring nitrogens and three ring carbons.