US PATENT SUBCLASS 148 / 222
.~.~ Utilizing ionized gas (e.g., plasma, etc.) or electron arc or beam

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}
222.~.~ Utilizing ionized gas (e.g., plasma, etc.) or electron arc or beam

DEFINITION

Classification: 148/222

Utilizing ionized gas (e.g., plasma, etc.) or electron arc or beam:

(under subclass 206) Process which uses at any process stage an ionized gas (e.g., plasma, etc.) or an electron arc or beam.