US PATENT SUBCLASS 137 / 170.1
.~ Foam control in gas charged liquids

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

154  DF  DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7}
170.1.~ Foam control in gas charged liquids {3}
170.2  DF  .~.~> Level or pressure responsive
170.3  DF  .~.~> Separate handling of foam
170.4  DF  .~.~> With conditioning trap or chamber {2}

DEFINITION

Classification: 137/170.1

(under subclass 154) Apparatus in which the fluids comprise a liquid and a gas which has been intentionally and desirably entrained in the liquid to form a mixture which is subject to frothing under certain conditions and having means for preserving or modifying the pressure of gas in the mixture, thereby controlling the amount of froth released, retained or formed in the handling of the mixture.

(1) Note. Disclosures of froth or foam control functions for structures of general utility in the fluid handling arts does not result in classification in this or the indented

subclasses unless there is a claimed disclosure of a combination of handling features which specialize the overall apparatus to a foam controlling function and for which no suitable general classification exists elsewhere.

SEE OR SEARCH THIS CLASS, SUBCLASS:

12.5, for methods of controlling foam in handling carbonated liquids.

206+, for gas pressure storage over or displacement of liquids in diverse fluid containing pressure systems, and see the search notes thereto.

SEE OR SEARCH CLASS 516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,

115+, for processes of or compositions for or subcombination compositions for the breaking of or inhibiting of foam colloid systems, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.