US PATENT SUBCLASS 148 / 214
.~.~.~.~ With noncarburizing or non-nitriding coating

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}
210  DF  .~.~ Of selected surface area (e.g., zone, top only, etc.) {3}
213  DF  .~.~.~ Utilizing attached protective shield, mask or coating {1}
214.~.~.~.~ With noncarburizing or non-nitriding coating

DEFINITION

Classification: 148/214

With noncarburizing or non-nitriding coating:

(under subclass 213) Process which includes a coating step other than carburizing or nitriding.