US PATENT SUBCLASS 423 / 616
.~.~.~.~.~ And utilizing acid

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

579  DF  OXYGEN OR COMPOUND THEREOF {4}
592  DF  .~ Metal containing {12}
608  DF  .~.~ Group IVB metal (Ti, Zr, or Hf) {2}
610  DF  .~.~.~ Titanium dioxide {2}
615  DF  .~.~.~.~ Utilizing titanium sulfate as reactant {1}
616.~.~.~.~.~ And utilizing acid

DEFINITION

Classification: 423/616

(under subclass 615) Processes in which an acid is associated with the process in any manner (e.g., as a solvent, as a reactant, etc.).