US PATENT SUBCLASS 219 / 121.59
.~.~.~ Methods

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

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
121.11  DF  .~ By arc {16}
121.36  DF  .~.~ Using plasma {8}
121.59.~.~.~ Methods

DEFINITION

Classification: 219/121.59

Methods:

(under subclass 121.36) Subject matter relating to processes of heating by an ionized gas plasma in a furnace or by a plasma torch.