US PATENT SUBCLASS 219 / 121.36
.~.~ Using plasma

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.~.~ Using plasma {8}
121.37  DF  .~.~.~> Melting {1}
121.39  DF  .~.~.~> Cutting {2}
121.45  DF  .~.~.~> Welding {1}
121.47  DF  .~.~.~> Spray coating
121.48  DF  .~.~.~> Plasma torch structure {5}
121.54  DF  .~.~.~> Control systems {3}
121.58  DF  .~.~.~> With work holder
121.59  DF  .~.~.~> Methods

DEFINITION

Classification: 219/121.36

Using plasma:

(under subclass 121.11) Subject matter wherein the working arc is an ionized gas plasma.

(1) Note. A plasma torch exclusive of furnace structure can be employed to heat the workpiece under this gas plasma.

SEE OR SEARCH CLASS

216, Etching a Substrate: Processes,

67+, for the use of plasma in an etching process.