(under subclass 678) Subject matter wherein a microwave heating apparatus is arranged to heat a fluent material.
(1) Note. A fluid material is one that flows easily from container to container and may be a fine granular material or just air.
SEE OR SEARCH THIS CLASS, SUBCLASS:
628+, for inductive heating of fluid or liquid.
772, for apparatus for dielectric heating a fluent material where the electromagnetic field acts directly on the fluent material.
SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers. 137, Fluid Handling,
341, for fluid handling apparatus having an electric heater.
138, Pipes and Tubular Conduits,
33, for fluid conduits with electric thawing and freeze protection means.
166, Wells,
60, for an electrical heater in a well and subclass 248 for processes of passing electric current or electrical wave energy through earth for treating it.
392, Electric Resistance Heating Devices,
301+, for fluid heating by electric resistance heating devices, also see subclass 341 for electric well heaters.
