(under the class definition) Compositions specialized and designed for, or peculiar to, use in preventing frost, thawing ice, maintaining temperatures within narrow ranges, supplying or absorbing heat, or producing low temperatures, by changes in phases insubstances (e.g., solidification and liquefaction) or other changes in substances other than mere temperature change, but excluding combustion and irreversible chemical reactions.
SEE OR SEARCH THIS CLASS, SUBCLASS:
67+, for compositions for refrigeration by vaporization or expansion, or processes of making such compositions.
SEE OR SEARCH CLASS
44, Fuel and Related Compositions, for liquid or solid compositions for producing heat by combustion, especially
250+, for a composition which produces heat by a flameless or glowless chemical reaction which is not readily reversible.
48, Gas: Heating and Illuminating, for gaseous fuels. 106, Compositions: Coating or Plastic,
13, for coating or plastic composition for preventing fog, frost or ice on a surface.
126, Stoves and Furnaces,
263.01+, for chemical heaters.
138, Pipes and Tubular Conduits,
34, for pipes with means to introduce an antifreeze substance.
523, Synthetic Resins or Natural Rubbers, appropriate subclasses, particularly
169, for a composition containing a synthetic resin or natural rubbers having utility to preserve visibility through a windshield or other optical device by preventing the buildup of fog or rendering the surface hydrophobic thereby causing the surface to repel water or to processes of preparing said composition.
