US PATENT SUBCLASS 252 / 188.22
.~.~.~ Hydrosulfite (dithionite)

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

188.1  DF  REDUCTIVE BLEACHANT, DEOXIDANT, REDUCTANT, OR GENERATIVE {4}
188.2  DF  .~ Sulfur containing reductant, bleachant, deoxidant, or generative {1}
188.21  DF  .~.~ Sulfite {1}
188.22.~.~.~ Hydrosulfite (dithionite) {1}
188.23  DF  .~.~.~.~> With organic additive {1}

DEFINITION

Classification: 252/188.22

Hydrosulfite (dithionite):

(under subclass 188.21) Composition which contains the specific hydrosulfite (dithionite) salt, i.e., (S2 04)-2, e.g., an oxygen consuming composition comprised of sodium dithionite (Na2 S2 04) and sodium sulfate, etc.