US PATENT SUBCLASS 504 / 154
.~.~ Hetero ring containing active ingredient

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}
150  DF  .~ Aquatic plant regulator (e.g., algicides, etc.) {7}
154.~.~ Hetero ring containing active ingredient {1}
155  DF  .~.~.~> Hetero ring includes nitrogen {1}

DEFINITION

Classification: 504/154

Hetero ring containing active ingredient:

(under subclass 150) Compositions wherein the active aquatic plant regulating agent contains a hetero ring.