US PATENT SUBCLASS 504 / 167
.~.~.~ Hetero ring is six-membered including nitrogen

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}
162  DF  .~ Abscission agent, defoliant, or desiccant {6}
166  DF  .~.~ Hetero ring containing active ingredient {2}
167.~.~.~ Hetero ring is six-membered including nitrogen {1}
168  DF  .~.~.~.~> Plural ring nitrogens in the hetero ring

DEFINITION

Classification: 504/167

Hetero ring is six-membered including nitrogen:

(under subclass 166) Compositions wherein the hetero ring is six-membered and has nitrogen as a ring member.