US PATENT SUBCLASS 148 / 655
.~.~.~ With separate handling or treating of air, water, or unspecified fluid treating media

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}
579  DF  .~.~ Iron(Fe) or iron base alloy {24}
655.~.~.~ With separate handling or treating of air, water, or unspecified fluid treating media

DEFINITION

Classification: 148/655

With separate handling or treating of the air, water, or unspecified fluid treating media:

(under subclass 579) Process wherein air, water, or an unspecified fluid treating media is subjected to a separate step of manipulation or treating outside of the metal treating operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

625, for process of treating the metal workpiece with a specified treating agent.