US PATENT SUBCLASS 148 / 710
.~.~.~ Utilizing particulate form in fluid bed


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}
559  DF  .~ Heating or cooling of solid metal {22}
708  DF  .~.~ Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum {5}
710.~.~.~ Utilizing particulate form in fluid bed


DEFINITION

Classification: 148/710

Utilizing particulate form in fluid bed:

(under subclass 708) Process wherein the specified agent is utilized in particulate form in a fluid bed to treat the metal or metal alloy.

(1) Note. Utilizing a particulate material for heat exchange purposes is acceptable for this subclass, if a fluid bed is involved.