US PATENT SUBCLASS 252 / 589
.~.~ Organic material

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

582  DF  LIGHT TRANSMISSION MODIFYING COMPOSITIONS {6}
588  DF  .~ Ultraviolet {1}
589.~.~ Organic material

DEFINITION

Classification: 252/589

Organic material:

(under subclass 588) Composition which are organic substances.