US PATENT SUBCLASS 423 / 20
.~.~.~ Acid leaching

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

1  DF  TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15}
2  DF  .~ Radioactive metal (At. No. 84+ or radioactive isotope of another metal) {1}
3  DF  .~.~ Actinide series metal (At. No. 89+) {7}
20.~.~.~ Acid leaching

DEFINITION

Classification: 423/20

(under subclass 3) Processes which include making a separation by using an acid as an active ingredient to leach, wash, or dissolve; see Glossary.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18, for similar processes which include acid leaching in combination with forming an insoluble substance in a liquid.