US PATENT SUBCLASS 219 / 391
.~.~ Oven type

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
391.~.~ Oven type {12}
392  DF  .~.~.~> Combined with additional material support
393  DF  .~.~.~> Oven performs plural diverse functions
394  DF  .~.~.~> With plural ovens
395  DF  .~.~.~> With plurality of separate heating units {3}
399  DF  .~.~.~> With heat energy transfer, distribution, or accumulator means {1}
401  DF  .~.~.~> With steam generating means
402  DF  .~.~.~> With casing or support for heating unit or units {3}
406  DF  .~.~.~> With resistance heating means surrounding heating area {1}
408  DF  .~.~.~> With resistance heating unit or units fixed enclosed by or located within heating area
409  DF  .~.~.~> With heating unit structure or composition {2}
412  DF  .~.~.~> With current or voltage control or regulating means {1}
414  DF  .~.~.~> With switch or other external circuit completing means

DEFINITION

Classification: 219/391

(under subclass 385) Subject matter wherein the special container or enclosure structure consists of a chamber designed for baking, heating or drying utilizing heated air and in which the material heated retains its original physical condition, shape or form and which chamber usually constitutes a part of a stove.

(1) Note. The subject matter classified here and in the indented subclasses differs from that to be found in subclasses 420+ below in that in the lower subclasses the

device is constructed of very high refractory material adapted to withstand extremely high temperatures whereby the heated material may be melted or otherwise treated to alter its chemical composition, condition, form or shape.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

201+, for houses, kilns and containers adapted for drying.

99, Foods and Beverages: Apparatus, 324+, for devices for the preparation of food combined with oven means.

110, Furnaces, appropriate subclasses for furnace structure combined with a container which is adapted for the burning of a particular material, particularly

230+, for solid fuel furnaces provided with coking means; and subclass 242 for a closed retort refuse incinerator.

118, Coating Apparatus,

58+, for coating apparatus combined with drying means for the coated material.

126, Stoves and Furnaces,

19+, for cooking ovens and subclasses 273+ for domestic ovens in general.

202, Distillation: Apparatus, appropriate subclasses for kilns and ovens.

362, Illumination,

92+, for oven structure combined with light means.

373, Industrial Electric Heating Furnaces, for high temperature furnaces, usually for melting highly refractory materials.