US PATENT SUBCLASS 504 / 291
.~.~.~ Oxygen containing hetero ring

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}
291.~.~.~ Oxygen containing hetero ring {2}
292  DF  .~.~.~.~> The hetero ring is six-membered {1}
294  DF  .~.~.~.~> The hetero ring is five-membered {3}

DEFINITION

Classification: 504/291

Oxygen containing hetero ring:

(under subclass 209) Compositions which contain a hetero ring having oxygen as a ring member.