US PATENT SUBCLASS 373 / 68
.~.~ With internal atmosphere control (e.g., pressure, vacuum, etc.)


Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

60  DF  ARC FURNACE DEVICE {9}
67  DF  .~ Ingot remelting {3}
68.~.~ With internal atmosphere control (e.g., pressure, vacuum, etc.)


DEFINITION

Classification: 373/68

With internal atmosphere control (e.g., pressure, vacuum, etc.):

(under subclass 67) Subject matter wherein the environment within the remelting furnace is regulated to have a specific pressure, a vacuum, or a specific medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

77, for other arc furnaces with internal atmosphere control.

110, for resistance furnaces with internal atmosphere control.

140, for induction furnaces with internal atmosphere control.