US PATENT SUBCLASS 219 / 73
.~.~ Slag (e.g., submerged arc)

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

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
72  DF  .~ Nonatmospheric environment at hot spot (e.g., resistance weld under oil, vacuum) {2}
73.~.~ Slag (e.g., submerged arc) {2}
73.1  DF  .~.~.~> Including electroslag welding {1}
73.2  DF  .~.~.~> With granular flux supply {1}

DEFINITION

Classification: 219/73

(under subclass 72) Subject matter in which the non-atmospheric environment is slag or a slag forming material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124.1+, for this subject matter in combination with means to automatically position an electric arc.

145.22, 145.23 and 146.1+, for mere arc electrodes having fluxing or slagging means.

SEE OR SEARCH CLASS

314, Electric Lamp and Discharge Devices: Consumable Electrodes,

21+, for arc lamps having an auxiliary material supply to the arc. 501, Compositions: Ceramic,

28, for glass batch forming compositions containing slag.