US PATENT SUBCLASS 209 / 176
.~.~.~.~.~.~ With chemical treatment

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

132  DF  FLUID SUSPENSION {2}
155  DF  .~ Liquid {5}
162  DF  .~.~ Floating {3}
172  DF  .~.~.~ Gravity liquid {3}
174  DF  .~.~.~.~ Metallic (i.e., amalgamators) {6}
175  DF  .~.~.~.~.~ Processes {3}
176.~.~.~.~.~.~ With chemical treatment {2}
177  DF  .~.~.~.~.~.~.~> Bath
178  DF  .~.~.~.~.~.~.~> Ore

DEFINITION

Classification: 209/176

(under subclass 175) Processes including chemical treatment other than chemical dissolution or formation of compounds of the metal sought which are limited by the inclusion of the amalgamating step or which are preparatory for or promotive of the amalgamating step and have no other utility.

(1) Note. This subclass will include processes not classifiable in the subclass indented thereunder, generally processes in which the chemical treatment affects both the material treated and the mercury or its equivalent or in which the effect is not definitely assignable to one or the other.

(2) Note. This subclass and subclass 178 do not include processes involving chemical treatment for decomposing or altering the composition of metallic constituents sought to be extracted unless limited to or having utility restricted to amalgamation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177, through 181, for other processes of chemical and for electrical treatments in connection with amalgamating step.

SEE OR SEARCH CLASS

204, Chemistry: Electrical and Wave Energy, 219, 220, 221, 250, and 251 for electrolytic apparatus for the production of amalgams.

205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,

558+, for electrolytic processes of producing amalgams.

420, Alloys or Metallic Compositions,

526+, for amalgams and methods of manufacturing them.