(under the class definition) Compositions specialized and designed for, or peculiar to, use in heat exchanges or which are low-freezing or high-boiling, or which are adapted to form mixtures having a lower pour-point or freezing point when mixed with other substances.
(1) Note. Elements other than C and H and compounds which contain such other elements are not considered to be significant in this class, when they originate in and form a part of petroleum or fractions thereof, unless such elements or compounds are recited separately in the claims.
(2) Note. This subclass provides, inter alia, for (1) claiming admixtures of ingredients, or claims to an old compound limited to use as a heat exchange agent, (2) processes of heat exchange comprising known heat exchange steps broadly recited and distinguished solely by the composition or compound used, and (3) apparatus with the composition or compound therein, where characteristics of apparatus structure are not claimed. The preceding are placed in this class even though freezing or boiling points or temparatures of use are specified.
SEE OR SEARCH THIS CLASS, SUBCLASS:
67+, for fluids for use in expansible-fluid engines.
70, for low temperature eutectic compositions.
570+, for fluent dielectric Compositions ("insulating oils") which contain a hydrocarbon and a nonhydrocarbon. SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers, for processes of heating liquids, etc., which may involve the use of compositions classified in this subclass (71) and its indents.
148, Metal Treatment,
27+, for metal treating compositions having a heat-transfer function.
165, Heat Exchange,
104.11+, for a heat exchange device with an intermediate fluent material receiving and discharging heat.
203, Distillation: Processes, Separatory, for processes of heating liquids, etc., which may involve the use of compositions classified in this subclass and its indents.
208, Mineral Oils: Processes and Products, for processes of heating liquids, etc., which may involve the use of compositions classified in this subclass and its indents.
508, Solid Antifriction Devices, Materials Therefor, Lubricant and Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions, for compositions similar to those of this subclass when such compositions are specialized for use as lubricants.
