US PATENT SUBCLASS 423 / 544
.~.~ Sulfate

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

511  DF  SULFUR OR COMPOUND THEREOF {4}
512.1  DF  .~ Oxygen containing {11}
544.~.~ Sulfate {7}
545  DF  .~.~.~> Ammonium containing {4}
551  DF  .~.~.~> Alkali metal containing (Li, Na, K, Rb, or Cs) {2}
554  DF  .~.~.~> Alkaline earth metal containing (Mg, Ca, Sr, or Ba) {1}
556  DF  .~.~.~> Aluminum containing
557  DF  .~.~.~> Copper containing
558  DF  .~.~.~> Iron containing
559  DF  .~.~.~> Lead containing

DEFINITION

Classification: 423/544

(under subclass 512.1) Products or processes wherein the compound contains the sulfate radical (SO4[supscrpt]2-[end supscrpt]).

(1) Note. Included under this definition is a compound which contains another negative ion in addition to the sulfate radical, e.g., basic lead sulfate (PbSO4. PbO). See search note below compounds containing different positive ions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

517, for products, or processes of making such products containing sulfur, oxygen and a metal and ammonium.

518, for a product containing sulfur, oxygen and two different metals.