US PATENT SUBCLASS 392 / 480
.~.~.~ Pipe or tube forms flow path

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
465  DF  .~ Continuous flow type fluid heater {12}
479  DF  .~.~ Externally heated line connected section {4}
480.~.~.~ Pipe or tube forms flow path {1}
481  DF  .~.~.~.~> Coiled

DEFINITION

Classification: 392/480

Pipe or tube forms flow path:

(under subclass 479) Subject matter wherein the flow path for the fluid to be heated comprises a fluid conveying elongated hollow cylinder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

304, for heating element surrounding delivery pipe.

320+, for fluid-in-circuit type heater.

397+, for continuous flow line connected heater for vaporizer.

461, for externally mounted circulation type heater.

468+, for pipeline tracing.

470, for disposable cartridge, tube or bag forms heated flow path.

472, for hose type heater.

482, for plural pipes or tubes forms flow path.

486+, for heated line section with heating element internal of flow path.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

279+, for infusers.

222, Dispensing,

146.1+, for heating or cooling means.