(under subclass 2) Compositions which are, or contain, foams or gas phases or processes of making the same.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6+, and 7, for fire extinguishive compositions containing components for producing foams.
8, for gas-charged liquids or processes of making them for extinguishing fires.
61, for compositions for producing foams for froth flotation.
SEE OR SEARCH CLASS 516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,
10+, for foam colloid systems or agents for such systems or making or stabilizing such systems or agents, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.
