US PATENT SUBCLASS 252 / 79.4
.~.~ With organic material

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

79.1  DF  ETCHING OR BRIGHTENING COMPOSITIONS {2}
79.2  DF  .~ Inorganic acid containing {2}
79.4.~.~ With organic material

DEFINITION

Classification: 252/79.4

(under subclass 79.2) Compositions which contain an organic material in addition to the acid.