US PATENT SUBCLASS 148 / 660
.~.~.~ Including cooling (e.g., quenching, etc.)

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}
660.~.~.~ Including cooling (e.g., quenching, etc.) {3}
661  DF  .~.~.~.~> Strip, sheet, or plate
662  DF  .~.~.~.~> Heating step follows cooling {1}
664  DF  .~.~.~.~> Multiple cooling steps

DEFINITION

Classification: 148/660

Including cooling (e.g., quenching, etc.):

(under subclass 579) Process which includes a cooling step (e.g., quenching, etc.).