US PATENT SUBCLASS 148 / 234
.~.~.~ Utilizing agent containing cyano (CN) radical or halogen (X) radical or metal carbonate

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}
225  DF  .~.~ Iron(Fe) or iron base alloy {7}
234.~.~.~ Utilizing agent containing cyano (CN) radical or halogen (X) radical or metal carbonate

DEFINITION

Classification: 148/234

Utilizing agent containing cyano (CN) radical or halogen (X) radical or metal carbonate:

(under subclass 225) Process which utilizes at any stage an agent containing a cyano (CN) radical or halogen (X=Fluorine, Chlorine, Bromine or Iodine) radical or a metal carbonate.