NONREACTIVE ANALYTICAL, TESTING, OR INDICATING COMPOSITIONS:
(under the class definition) Compositions specialized and designed for, or peculiar to, use in physical analysis, testing or indicating, or as warning agents which do not chemically react in use.
SEE OR SEARCH THIS CLASS, SUBCLASS:
68, for refrigerants containing warning agents.
301.16, for compositions containing fluorescent or phosphorescent substances as analytical, testing, or identification agents.
SEE OR SEARCH CLASS
48, Gas: Heating and Illuminating,
195, for fuel gases containing warning agents.
73, Measuring and Testing, for testing processes and apparatus not otherwise classified. 424, Drug, Bio-affecting and Body Treating Compositions,
9.1+, for a composition adapted to diagnose a body condition or for a method of determining the potency of a composition of that class (424) by a test in a living body.
436, Chemistry: Analytical and Immunological Testing, for compositions useful as standards or as materials used in a
process of analysis involving a chemical reaction.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, appropriate subclasses for subject matter relating to: colloid systems (such as sols*, emulsions, dispersions, foams, aerosols, smokes, gels, or pastes) or wetting agents (such as leveling, penetrating, or spreading); subcombination compositions of colloid systems containing at least an agent specialized and designed for or peculiar to use in making or stabilizing colloid systems; compositions and subcombination compositions specialized and designed for or peculiar to use in breaking (resolving) or inhibiting colloid systems; processes of making the compositions or systems of the class; processes of breaking (resolving) or inhibiting colloid systems; in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art; including those instances when a composition would otherwise be proper for this subclass (408.1).
