US PATENT SUBCLASS 148 / 684
.~.~.~ 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}
679  DF  .~.~ Copper(Cu) or copper base alloy {4}
684.~.~.~ With working {1}
685  DF  .~.~.~.~> With ageing, solution treating (i.e., for hardening), precipitation hardening or strengthening

DEFINITION

Classification: 148/684

With working:

(under subclass 679) Process which includes a metal deforming step at from 400 deg.C down to 20 deg.C or cold working at an unspecified temperature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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