US PATENT SUBCLASS 148 / 113
.~.~.~.~ With special compositions

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}
110  DF  .~.~ Silicon steel {2}
112  DF  .~.~.~ Heat treatment {1}
113.~.~.~.~ With special compositions

DEFINITION

Classification: 148/113

(under subclass 112) Processes wherein in the work is in contact with a special composition or atmosphere which does not form a reactive coating with the base, and wherein the work is not subjected to a mechanically applied force.

SEE OR SEARCH THIS CLASS, SUBCLASS:

110, for processes wherein silicon steel is subjected to a substantial force, as by clamping, while in contact with a special material or composition without effecting any change in shape or dimensions.

240+, for processes wherein the only treatment employed, to alter the magnetic properties of a metallic material, is a reactive coating of a metal base.

625+, for other heat treating of ferrous metal with special compositions.