US PATENT SUBCLASS 148 / 695
.~.~.~ With working

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}
688  DF  .~.~ Aluminum(Al) or aluminum base alloy {5}
695.~.~.~ With working {1}
696  DF  .~.~.~.~> Multiple working steps {1}

DEFINITION

Classification: 148/695

With working:

(under subclass 688) Process which includes a metal deforming step at 400 deg.C down to 20 deg.C.

SEE OR SEARCH THIS CLASS, SUBCLASS:

577, for processes treating solid or semi-solid metal at temperatures below 20 deg.C.