US PATENT SUBCLASS 148 / 224
.~.~ Utilizing wave energy (e.g., laser, etc.) or electric heating with work as conductor

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

95  DF  PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17}
206  DF  .~ Carburizing or nitriding using externally supplied carbon or nitrogen source {15}
224.~.~ Utilizing wave energy (e.g., laser, etc.) or electric heating with work as conductor

DEFINITION

Classification: 148/224

Utilizing wave energy (e.g., laser, etc.) or electric heating with work as conductor:

Process under 206 which uses wave energy (e.g., laser, etc.) or electric heating with a metal workpiece as a conductor by passing a current of electricity through the workpiece to cause heating thereof at any stage in the process.

SEE OR SEARCH THIS CLASS, SUBCLASS:

222, for a process which uses ionized gas (e.g., plasma, etc.) or an electron arc or beam.