US PATENT SUBCLASS 423 / 483
.~.~ Hydrogen fluoride

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

462  DF  HALOGEN OR COMPOUND THEREOF {10}
481  DF  .~ Hydrogen halide {4}
483.~.~ Hydrogen fluoride {1}
484  DF  .~.~.~> From impure starting material {1}

DEFINITION

Classification: 423/483

(under subclass 481) Products or processes in which the halogen is fluorine.