US PATENT SUBCLASS 423 / 143
.~.~.~ Utilizing or forming nitrogenous compound

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}
138  DF  .~ Iron group metal (Fe, Co, or Ni) {7}
140  DF  .~.~ Forming insoluble substance in liquid {4}
143.~.~.~ Utilizing or forming nitrogenous compound {2}
144  DF  .~.~.~.~> Carbonating, hydroxylating, or hydrating
145  DF  .~.~.~.~> Sulfating

DEFINITION

Classification: 423/143

(under subclass 140) Processes wherein a nitrogen containing compound is formed, reacted, or placed in contact with the mixture during part of the process.