US PATENT SUBCLASS 210 / 600
PROCESSES

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

600PROCESSES {14}
601  DF  .~> Treatment by living organism {13}
632  DF  .~> Treating by enzyme
633  DF  .~> Extracting utilizing solid solute
634  DF  .~> Liquid/liquid solvent or colloidal extraction or diffusing or passing through septum selective as to material of a component of liquid; such diffusing or passing being effected by other than only an ion exchange or sorption process {11}
656  DF  .~> Chromatography {3}
660  DF  .~> Ion exchange or selective sorption {8}
695  DF  .~> Using magnetic force
696  DF  .~> Preventing, decreasing, or delaying precipitation, coagulation or flocculation {2}
702  DF  .~> Making an insoluble substance or accreting suspended constituents {14}
739  DF  .~> Including controlling process in response to a sensed condition {7}
747  DF  .~> Including geographic feature (e.g., drainage ditch, septic, pond)
748  DF  .~> Utilizing electrical or wave energy (directly applied to liquid or material being treated)
749  DF  .~> Chemical treatment {8}
767  DF  .~> Separating {16}

DEFINITION

Classification: 210/600

PROCESSES:

(under the class definition) Process by which a liquid (a) of no specific utility, (b) of general utility, or (c) water (either for use or discharge) is treated by mechanical, physical, or chemical means to perfect it for an intended use or render it less noxious.

(1) Note. A process of treating a specific liquid material, other than water, is provided for on the basis of the classification of that material. See section III, B, 2 of the main class definition. A process of treating a liquid for which there is no other classification, e.g., blood, per se, is provided for in this class. Class 516 is the locus for the breaking of colloid systems generically claimed and provides for (a) the separation or purification of liquids, generally

claimed, when performed by a Class 516 process, such as by breaking an emulsion, dispersion, or foam, and for such processes further including ancillary steps, such as, decanting, or passing through a separatory funnel, etc., or (b) processes in which recovery is intended of both water and another product. Class 210 provides for (a) processes which include a step of colloid system resolution of liquids, generally claimed, when combined with a step of separation of a diverse component, unless that step is also a Class 516 step (i.e., multiple Class 516 steps are proper for placement in Class 516), or (b) a step of colloid system breaking, per se, for the purpose of obtaining water, wherein the water may be intended for use or intended to be made suitable for disposal, thus, decontaminating of sewage waste water to be dumped into the ocean using an emulsion breaking step is proper for Class 210.

(2) Note. This subclass provides for a chemical treatment of a liquid if no chemical is added but constituents already in the liquid react as by heating. See subclasses 749+ for a process including addition of a chemical agent.

(3) Note. The processes provided for in subclasses 633, 634+, 656+, and 660+ utilize similar functions based on relative attraction or repellancy of materials and an explanation of the distinction between the concepts of subclasses 633 and 634+ on the one hand and of subclasses 656+ and 660+ on the other hand, is given in the definition of subclass 634.