US PATENT SUBCLASS 148 / 540
.~.~ Iron(Fe) or iron base alloy


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}
538  DF  .~ With casting or solidifying from melt {6}
540.~.~ Iron(Fe) or iron base alloy {5}
541  DF  .~.~.~> Continuous casting
542  DF  .~.~.~> Containing at least nine percent chromium(Cr) (e.g., stainless steel, etc.)
543  DF  .~.~.~> Containing at least 1.5 percent carbon {2}
546  DF  .~.~.~> With working {1}
548  DF  .~.~.~> With tempering, ageing, solution treating (i.e., for hardening), precipitation hardening or strengthening, or quenching


DEFINITION

Classification: 148/540

Iron (Fe) or iron base alloy:

(under subclass 538) Process wherein the metal being cast is iron (Fe) or an iron alloy containing greater than 50 percent iron.