Manual of U.S. Patent Classification
as of June 30, 2000

Class
392
ELECTRIC RESISTANCE HEATING DEVICES

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Subclass definitions may be accessed by clicking on the subclass number, below.

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Subclass		Title
ClassTitle		===> ELECTRIC RESISTANCE HEATING DEVICES
		This Class 392 is considered to be an integral part of Class 219 (see the Class 219 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 219.
		HEATING DEVICES (CLASS 219 SUBCLASS 200)
301		. Borehole type
302		. . With heat exchange fluid
303		. . With vapor generator
304		. . Heating element surrounding delivery pipe
305		. . Suspended by cable in well
306		. . Plural separate heating devices
307		. Combined with nonelectric heating means (e.g., gas, etc.)
308		. . For heating liquid
309		. . Hot plate
310		. . Oven type
311		. Fluid-in-circuit type heater
312		. . Method
313		. . Portable
314		. . Continuous flow of fluid being heated
315		. . . With means to adjust current path between electrodes
316		. . . . Responsive to condition of fluid
317		. . . . Movable dielectric means
318		. . . Current control means
319		. . . With discharge member for line or tank
320		. . . Tube or pipe forms flow path
321		. . . . Pipe forms at least one electrode
322		. . With reservoir or tank
323		. . . With means to adjust current path between electrodes
324		. . Steam or vapor generator
325		. . . Line connected boiler
326		. . . . Control of electrode immersion level
327		. . . . . By electrode current
328		. . . . . By pressure
329		. . . . With means to adjust current path between elctrodes
330		. . . . . Movable dielectric means
331		. . . . Electrode arrangement
332		. . . . . Water jet electrode
333		. . . Manually filled tank or container
334		. . . . With means to adjust current path between electrodes
335		. . . . With supply interlock means
336		. . . . Separate electrode compartment
337		. . . . . Electrode compartment removable from tank
338		. . Electrode details
339		. With heat storage means
340		. . Method
341		. . For fluid heating (e.g., gas or liquid, etc.)
342		. . For vaporization
343		. . For subsequent heating by radiation
344		. . For subsequent heating by convection
345		. . Means to control heating accumulating medium
346		. . Heat accumulating medium details
347		. Convection space heater
348		. . Artificial fire
349		. . Central heating type
350		. . . With air delivery duct
351		. . Floor furnace type
352		. . Baseboard type
353		. . . With baffle
354		. . With intermediate heat absorber
355		. . . Heated by radiant source
356		. . . . With fan blower
357		. . . With fluid heat absorber
358		. . . . By fan blower
359		. . . . Wall mounted
360		. . Forced air type
361		. . . Heating attachment for fan
362		. . . Fan with heated blades
363		. . . Wall mounted
364		. . . Ceiling mounted
365		. . . Portable
366		. . . . With fan position adjusting means
367		. . . . Multi-direction air outlet
368		. . . . With baffle
369		. . . . . Counterflow
370		. . Wall mounted
371		. . . In wall cavity
372		. . Mounted in or on window or door
373		. . Portable
374		. . . With baffle
375		. . Combined with radiation
376		. . . With reflector
377		. . . With heat exchange fluid
378		. . . . In plural sections
379		. Concentrated heated air stream (i.e., blast)
380		. . For drying body part
381		. . . Wall mounted
382		. . With support
383		. . Portable
384		. . . With handle
385		. . . . Pistol-grip type
386		. Vaporizer
387		. . Method
388		. . For metal vapor deposition
389		. . . With crucible
390		. . With disposable evaporant cartridge or container
391		. . By radiant heat source
392		. . Wall mounted
393		. . By light bulb heat source
394		. . Liquid evaporant (e.g., water, etc.)
395		. . . With wick
396		. . . In continuous flow line connected heater
397		. . . . Pipe or tube forms flow path
398		. . . . . With internal heating element
399		. . . Flash chamber
400		. . . In-line connected closed tank (i.e., pressurized)
401		. . . . With internal heating element
402		. . . In-line connected open tank or container (i.e., nonpressurized)
403		. . . Container with self-contained evaporant supply
404		. . . . Hand-held
405		. . . . With separate heating chamber
406		. . . . . Removable
407		. Radiant heater
408		. . With filter or diffuser for radiant energy
409		. . Hand-held
410		. . . With air or gas circulation
411		. . Lamp banks (i.e., array of plural lamps)
412		. . . Adjustable lamps position
413		. . . . Adjustable individual lamp position
414		. . . Lamp banks form arch
415		. . . Lamp banks movable relative to stationary work during use
416		. . With chamber
417		. . For heating moving strand, web or sheet
418		. . With support for workpiece
419		. . Focussed radiant beam
420		. . . Plural reflectors
421		. . . Elliptical or ellipsoidal reflector
422		. . With reflector
423		. . . Elongated reflector
424		. . . . Heating element in transparent tubular envelope
425		. . . . With exposed radiant heating element
426		. . . Bowl-shaped reflector
427		. . . . Annular heating element concentric with reflector axis
428		. . . . Linear heating element aligned with reflector axis
429		. . . . . Coiled on core
430		. . . Wall mounted
431		. . . Collapsible or foldable reflector
432		. . Radiant extended surface type heater
433		. . . With exposed radiant heating element
434		. . . . On ceramic support structure
435		. . . With heat radiating panel
436		. . . . Wall or ceiling mounted
437		. . . . . Plural panels
438		. . . . Heating element formed as coating on radiating panel surface
439		. . . . . Nonmetallic panel
440		. . Multi-direction radiant heat output
441		. Tank or container type liquid heater
442		. . Pour-in displacement discharge type tank
443		. . Flexible container (e.g., water bottle, etc.)
444		. . Portable container or tank
445		. . . Plural compartments
446		. . . With agitator
447		. . . With internally positioned heating element
448		. . . . Removably inserted through fill opening
449		. . Line connected tank
450		. . . Plural serially connected compartments
451		. . . With immersion heating element
452		. . . . With baffle or guard
453		. . . . Removably insertable into tubular receptacle in tank
454		. . . . Plural heating zones
455		. . . . With heating element mounting arrangements
456		. . . . With heat exchange fluid
457		. . . . With protecting means against galvanic corrosion
458		. . . With external heater
459		. . . . Clamped or secured to tank wall
460		. . . . Producing radiation
461		. . . . With externally mounted circulation-type heater
462		. . . . . Laterally disposed (i.e., side-arm type)
463		. . . With timer controlled energization
464		. . . . Off-peak power
465		. Continuous flow type fluid heater
466		. . Method
467		. . With hot plate
468		. . Pipeline tracing
469		. . . Skin effect heater type (e.g., S.E.C.T., etc.)
470		. . Disposable cartridge, tube or bag forms heated flow path (e.g., blood bag, etc.)
471		. . Combined liquid flow heater and pump unit
472		. . Flexibe (e.g., hose, etc.)
473		. . Fluid heater carried on discharge member
474		. . . With flow control valve (e.g., faucet, etc.)
475		. . . . Valve turns heating element on and off
476		. . . Hand-held discharge member
477		. . . . With storage container for fluid to be heated
478		. . Fluid conveying tube or pipe comprising resistive heating element
479		. . Externally heated line connected section
480		. . . Pipe or tube forms flow path
481		. . . . Coiled
482		. . . Plural pipes or tubes form flow path
483		. . . Heating element producing radiation
484		. . . Block forms flow path
485		. . Heated line section with heating element internal of flow path
486		. . . Plural pipes or tubes form flow path
487		. . . With jacket for heating element
488		. . . Pipe or tube forms flow path
489		. . . . With jacket for heating element
490		. . . Plural heated line sections (e.g., series or parallel, etc.)
491		. . . With baffle-defined flow path
492		. . . . Producing counterflow circulation
493		. . . . . Heating element integral with baffle
494		. . . Block forms flow path
495		. . Plural different fluids simultaneously heated
496		. . With heat exchange fluid
497		. Immersion heater details
498		. . With thermostatic control means
499		. . Buoyant in liquid
500		. . With plural heating elements
501		. . With particular mounting means
502		. . Having positive temperature coefficient
503		. . Particular sheath or jacket composition

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Last Modified: 6 October 2000