(under the class definition) Compositions specialized and designed for, or peculiar to, use in absorbing, binding, removing, retaining, or emitting water, or maintaining water concentrations within certain ranges, excepting mere adsorbents and mere analytical, testing, or indicating compositions.
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181.1, for getters for electric lamps, electric space discharge devices, and other evacuated or gas or vapor filled containers which are designed to absorb, bind, remove, or retain water vapor from the atmosphere in the container.
408, for analytical, testing, or indicating compositions.
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502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making, for a composition comprising a catalyst which may be used in or as an incandescent mantle composition.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, 98+, for colloid systems of continuous or semicontinuous solid phase with discontinuous liquid phase (gels, pastes, flocs, coagulates) 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.
