US PATENT SUBCLASS 219 / 678
MICROWAVE HEATING

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

678MICROWAVE HEATING {15}
679  DF  .~> With diverse device
680  DF  .~> With diverse-type heating {2}
686  DF  .~> Gas environment (e.g., pressurized, etc.)
687  DF  .~> Fluid heater {2}
690  DF  .~> Waveguide applicator {3}
698  DF  .~> Tunnel furnace {2}
702  DF  .~> With control system {8}
725  DF  .~> Cookware (e.g., vessel, utensil, etc.) {7}
736  DF  .~> Radiation protection {2}
745  DF  .~> Field modification {3}
756  DF  .~> Enclosed cavity structure {2}
759  DF  .~> With heat exchange (e.g., susceptor, etc.)
760  DF  .~> With specific transformer
761  DF  .~> With specific generator
762  DF  .~> Load support {1}

DEFINITION

Classification: 219/678

MICROWAVE HEATING:

(under the class definition) Subject matter for the electric heating of a material or object by applying a field of electromagnetic wave radiation in a frequency range from about 1 gigahertz to 3 gigahertz.

(1) Note. The work may be exposed to the emanations of a

free space antenna or placed at an appropriate position in a wave guide or resonant cavity, etc.

(2) Note. For claims reciting both food (edible) and nonfood (nonedible) heating by an electric heating device or method, classification is proper for Class 219. If the claims recited are limited to food (edible) heating methods, composition, product, or processes, classification is proper for Class 426.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

1, by electromagnetic energy.

99, Foods and Beverages: Apparatus, 451, for apparatus for treating food by radiant electrical energy and digest 14 for cooking by induction heating.

126, Stoves and Furnaces,

19+, and 273+ for oven structure.

174, Electricity: Conductors and Insulators,

35, for shielded or screened anti-inductive structures.

204, Chemistry: Electrical and Wave Energy,

193+, for treating substances with electrical or radiant energy to effect a chemical change.

250, Radiant Energy,

324+, for a method and apparatus for a fluent material or object for corona irradiation; subclasses 428+ for a method and apparatus for fluent material containment, support, or transfer means with or without an irradiating nuclear or electromagnetic radiation source; and subclasses 453.11+ for methods and apparatus to support an object for nuclear or electromagnetic radiation.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

405+, for direct application of electrical or wave energy to work.

315, Electric Lamp and Discharge Devices: Systems, 39+, for a discharge device load with a distributed parameter-type transmission line, subclasses 39.51+ for a distributed parameter resonator-type magnetron, and subclasses 94+ with a cathode or cathode heater supply circuit.

323, Electricity: Power Supply or Regulation Systems, appropriate subclasses for power supplies and regulators of electrical device systems.

331, Oscillators, appropriate

86+, for a magnetically controlled space discharge device (e.g., magnetron).

333, Wave Transmission Lines and Networks, appropriate subclasses for wave transmission lines and networks, particularly

24+, for coupling networks and subclasses 219+ for resonators (e.g., cavity or wave guides).

334, Tuners, appropriate subclasses for tuners which may be adapted for use as a heating device, especially

26+, for tuning units which may be adapted for use as a heating device and which have means for automatically centering the frequency to which the tuner is adjusted.

342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation), appropriate subclasses for radio wave energy.

343, Communications: Radio Wave Antennas,

700+, for antenna structures. 363, Electric Power Conversion Systems, appropriate subclasses for an inverter and/or converter system.

392, Electric Resistance Heating Devices, for heating devices using resistance heaters.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

21, and 22+ for processes of the class using microwave or other electrical or electromagnetic radiation and subclasses 186+ for apparatus for the chemical treatment of material using radiant electrical energy.

425, Plastic Article or Earthenware Shaping or Treating: Apparatus,

174+, for means of applying electrical or wave energy directly to work.

426, Food or Edible Material: Processes, Compositions, and Products,

107+, for a packaged or wrapped product having a specific electrical or wave feature and subclasses 234+ for the direct

application of electrical or wave energy to food material.

600, Surgery,

9+, for a magnetic field applied to the body for therapeutic purposes.

606, Surgery, 27+, and 32+ for heat or electrical application.

607, Surgery: Light, Thermal, and Electrical Application,

1+, for light and thermal application to the body and subclasses 114 through 156 for an electrical energy applicator.