US PATENT SUBCLASS 252 / 181
.~.~ With inorganic matter other than alkali-metal hydroxides and carbonates and water

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

175  DF  WATER-SOFTENING OR PURIFYING OR SCALE-INHIBITING AGENTS {4}
180  DF  .~ Plant or organic material containing {1}
181.~.~ With inorganic matter other than alkali-metal hydroxides and carbonates and water

DEFINITION

Classification: 252/181

(under subclass 180) Compositions which contain inorganic compounds or elements other than alkali metal hydroxides, alkali metal carbonates and water.