US PATENT SUBCLASS 423 / 485
.~.~.~.~ Fluorspar

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  DF  .~.~ Hydrogen fluoride {1}
484  DF  .~.~.~ From impure starting material {1}
485.~.~.~.~ Fluorspar

DEFINITION

Classification: 423/485

(under subclass 484) Processes wherein the impure initial material is the mineral fluorspar (calcium fluoride, fluorite, CaF2).