US PATENT SUBCLASS 148 / 605
.~.~.~ Nine percent or more chromium(Cr) (e.g., Stainless steel, 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}
605.~.~.~ Nine percent or more chromium(Cr) (e.g., Stainless steel, etc.) {4}
606  DF  .~.~.~.~> Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum
607  DF  .~.~.~.~> Ageing, solution treating (i.e., for hardening), precipitation strengthening or precipitation hardening {1}
609  DF  .~.~.~.~> With working {1}
611  DF  .~.~.~.~> Austenitic phase structure

DEFINITION

Classification: 148/605

Nine percent or more chromium (Cr) (e.g., stainless steel, etc.):

(under subclass 579) Process wherein the Iron alloy undergoing treatment contains nine percent or more chromium (Cr) (e.g., stainless steel, etc.).