(under subclass 300) Compositions which are emulsions.
(1) Note. To be placed in this subclass, the liquid fuel composition must be described as an "emulsion" or "microemulsion" in either the claims or the specification.
(2) Note. Classified herein are emulsions of water and hydrocarbonaceous fuels, usually with added surfactants.
(3) Note. See (5) Note in the class definition for the definition of hydrocarbon.
SEE OR SEARCH CLASS
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, for colloid systems (e.g., emulsions) or agents for such systems or making or stabilizing such systems or agents, especially subclass 20 for oil-in-oil emulsion,
subclasses 21+ for water-in-oil emulsion, subclasses 53+ for oil-in-water emulsion; in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.