US PATENT SUBCLASS 148 / 520
.~.~.~ With induction heating

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}
516  DF  .~ Producing or treating layered, bonded, welded, or mechanically engaged article or stock as a final product {9}
519  DF  .~.~ Pipe or tube {2}
520.~.~.~ With induction heating

DEFINITION

Classification: 148/520

With induction heating:

(under subclass 519) Process which includes a step of heating the metal workpiece by utilizing a magnetic field to induce a flow of electrons in the workpiece that results in production of heat.

SEE OR SEARCH CLASS

219, Electric Heating, appropriate subclasses for induction heating, per se, of a metal or for working and induction heating of metal which does not meet the criteria for significant heating as described under the notes in

95, of Class 148.