US PATENT SUBCLASS 219 / 651
.~.~ Gas environment

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

600  DF  INDUCTIVE HEATING {7}
647  DF  .~ With workpiece support {7}
651.~.~ Gas environment

DEFINITION

Classification: 219/651

Gas environment:

(under subclass 647) Subject matter wherein an atmospheric condition other than air is surrounding the workpiece.

(1) Note. A gaseous environment in combination with an enclosure surrounding the material or object is classified within.

SEE OR SEARCH THIS CLASS, SUBCLASS:

686, for a microwave heating device with a specific gas environment.