US PATENT SUBCLASS 148 / 121
.~.~ Heat treatment

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}
100  DF  .~ Magnetic materials {7}
121.~.~ Heat treatment {1}
122  DF  .~.~.~> With special compositions

DEFINITION

Classification: 148/121

(under subclass 100) Processes restricted to heating and/or cooling.

SEE OR SEARCH THIS CLASS, SUBCLASS:

112, for processes of the type defined above when the material being treated is a silicon steel.