.~.~.~> Skin effect heater type (e.g., S.E.C.T., etc.)
DEFINITION
Classification: 392/468
Pipeline tracing:
(under subclass 465) Subject matter wherein the heating device comprises the entire length of a pipeline carrying the flow of fluid which is heated by a linearly extending electrical resistance heater coextensive with the exterior of the pipeline length.
SEE OR SEARCH THIS CLASS, SUBCLASS:
472, for flexible fluid heater.
479+, for heated line section with heating elements external of flow path, particularly 480-482 for a pipe or tube forming flow path.
485+, for heated line section with heating element internal of flow path.
486, for plural pipes or tubes form flow path.
488+, for pipe or tube forms flow path. SEE OR SEARCH CLASS
137, Fluid Handling,
301+, for hydrant with freeze protection which may include a heater and subclasses 334+ for systems with heating and cooling.
138, Pipes and Tubular Conduits,
32+, for thawing and freezing protection.
219, Electric Heating,
522, for housing, casing, or support performing plural diverse functions and subclass 535 for a pipe to be heated.
222, Dispensing,
146.1+, for a device with heating or cooling means.
