US PATENT SUBCLASS 148 / 105
.~.~ Particulate material

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}
105.~.~ Particulate material

DEFINITION

Classification: 148/105

(under subclass 100) Processes wherein the material is in particulate form at the time its magnetic properties are altered, as well as at the end of the process.

(1) Note. The products of processes of this subclass are in the form of powder, granules, flakes, lumps, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

513, for processes of heat treating particulate metal not involving altering the magnetic properties thereof.